I'm liking it, but I can't catch all the letters. :/ I'll try again when I'm not so sleepy...

You don't need to.

Does the box on the T mean anything? And if so, what?

The addition of the same six letters to each column can spell a new word. Once you figure out what the six letters are, then the highlighted T will help you find the next clue.

For the letters, do you mean, like, scrambled?

Same six-letter string... but, you don't start at the same point in each column

Do you mean rows instead of columns? I'm finding myself trying to create 5 11-letter words that contain the same 6-letter strings and I'm getting nowhere. Am I on the right track?

I have all the letters but they don't work when I use them as part of the URL.

Columns is one way to thing about it. Boxes might be another.

find a 6 letter string of letters,

watch intently. the answer will reveal itself only to the patient!

write down the rows underneath each other, to make columns.

I am watching the gif - I get that it is animated and I even have a gif editor that allows me to see both images together.

All I know is that the letters that change make up a phrase. That phrase does not work.

Is there anything else that I am missing?

The letters spell a phrase, but what does that phrase cover up?

How do I come up with 6 letters when only five columns/rows of letters are given? I'm coming at this all wrong, aren't I?

Also, does the order matter? Like, the order that each row is given in the gif? I put them together to make columns, but the way the columns appear isn't helping much.

its misleading that the boxes are on the side of the letters:

If I follow each box through all six pictures I get 49 six-letter words, six of which are spelled incorrectly. However, I can't make those six words form any other word for me. I've tried putting the incorrect letters together and their correct replacements.

"Each column starts in a different row and then reads down from that letter the five given letters, finishing with the six missing letters."

five given letters?

I have the 6 letters, but now what? what does the highlighted T have to do with anything?

Assuming you came up with the correct six missing letters, the highlighted T indicates which 11-letter word is the answer.

There are two different 6 letter words that can be used in conjuction with the existing letters to make 5 11 letter words. If you are using a 6 letter word that is a word in itself, replace the "ve" with an "on" and you will have the right answer.

I noticed a hidden message that could help select the correct six-letter word, but the message is so obvious, I can't help feeling it's a red herring...

3rd and fourth letter patterns)

you don't have to find a phrase to get the answer

Gah! Where did those Weeping Angels come from?

The second frame of the GIF contains a fairly obvious message, though it's not as easy to follow. The last words are "The other K", and there is only one other K in all the grids. It's possible that you need to literally follow the directions, and that the positions you find could refer to any letter that fits in that position across the GIF.

I get that each column, plus six letters, makes words. Someone said it's the same six letters added to each column. I know that I don't begin each column at the same point: i.e., 12345 vs 23451 vs 34512 vs 45123 vs 51234. But do the additional six letters get added in the same order each time?

Take each group of letters and write them out, one group on top of the other. Then use the same order ray9na mentioned above, but vertically. Once you've done that, you should find a six letter word that can be added to the end of each of these. The correct answer is the full 11-letter word that starts with the letter in the black box.

Is the first step to find the six-letter string that makes a complete word out of the sets of letters I already have? I'm not really seeing any that will work. Is this supposed to be pure guesswork?

Writing out your clues, rather than staring at letters in boxes, is really, really helpful

I get the obvious clue from one of the six grids and use it on one other grid to get a four letter word. So the other four grids are just red herrings?

Is there some trick to getting the six-letter string? Because no matter how long I stare at all those sets of letters, I cannot think of any words to make.

Were those other boxes to the right there as a red herring or something? Because I didn't use them at all to get the answer.

Ignore the six boxes to the right. Pay attention to columns, not rows.

I finally worked around the first five letters of each word. What tripped me up for a while was that I was getting confused between 6-letter word A and related 6-letter word B. The one that works for the other four but seems a bit odd for one of them ... I looked it up and it is a legitimate word after all.

Considering the first part, are the other parts that don't explicitly contain the central thing we're looking for relevant? If the answer is no, then I think I have an answer. It's a word, at any rate.

I followed the message exactly, and got a letter that didn't have any words connected to it. If I followed the message another way (which seemed backwards to me), I found what I think is the 4-letter word other people are referring to. But it's so obvious that you don't have to actually do anything to find it, so I'm skeptical that it's the answer

I also thought of looking at the other grids and seeing if the other letters in the same spot as the one I first landed on spelled out a word. I got a kind of dark phrase that I don't think would be the answer to a JIG puzzle

And "Go laces!" (from another grid) may be my new favorite catchphrase (not a hint, just something I thought was funny)

Are you talking about the message in the grid that has an O in the upper-left corner? If so, I don't really see how to follow those directions, as they mention numbers? I think it might be a red herring.

But then again, all I've done is found a bunch of words (43 to be exact) and six misspellings of words, just like jwjohnsen said. I've tried combining the missing letters from the misspelled words, I've tried combining the incorrect letters, nothing works. Maybe this is the red herring?

All you talking about four letter words are on the wrong track. It's a six-letter word. And yes, you do have to sort of follow the instructions "backwards"

Pay attention to all the letters in any of box locations.

I followed the instructions in the first panel, and then selected the 6-letter word that contained the indicated letter. It didn't have the "aha!" feeling tigrita mentioned, but I'm done staring at it.
If anyone's wondering how I selected a 6-letter word, keep in mind that

If I follow the directions backwards, I get a five letter word. Or a nine-letter word.

You follow the "map" to find the correct square, then you let that square cycle through the sequence to see the six letter word.

I'm coming up with a 2-word phrase, 1-letter and 5-letters respectively.

You are going to feel kind of dumb when you see it. I think you have the right letters. In addition to forming two words as you mentioned, they can form one single six-letter word. You're almost there!

So, the word will just be one of the 49 words I can make by cycling through the boxes? That seems... too easy? Like other people have been saying, I don't get an "aha!" feeling from that solution.

The letters that flash are too fast to understand. Or does it flash a whole new message after many, many, loops? Some help would be appreciated.

"watchme" is not the answer to #2. Er...any more hints?

No, Watchme is not the answer. Look in the other frame.

"which word can be added to all these to make another word"

Alright. So I have to write down the rows, one below each other? Then...

Which one do I start with? The one with the highlighted T? And, what do I do with the boxes? That's probably the most confusing of the lot. I get that I have to put the rows on top of each other, but I am totally confused with everything else. What do I do with the boxes? When do I find the six letter string? Do I write it horizontally or vertically? Is the six letter string the same each time? I am confused like you wouldn't believe.

put the five rows on top of each other with the six extra blanks below

Not only do I have to put them on top of each other, I also have to unscramble? Because the second-to-last makes "rdist", not "distr".

I think some of the confusion came from the grid we're directed to not being the actual starting point for the answer.

Not "unscramble", but start at a different row for each column.

The square (not grid) that I was directed to was indeed the square containing the answer... not the "starting point", but the square to watch.

I think the Aha moment comes in where you have to figure out how to find the exact word.

Were square, rueful, and eaglet supposed to be misspelled? And what were ooside and omelot supposed to be? I thought all 49 were words.

Me: "Seriously? They expect us to solve THIS?"
*brain works furiously, but to no avail*
*notices something*
Me: "Wait a second! Was that a word?"
*patiently waits for that frame to come back*
Me: "Not just one word... more!"
*writes down message*
*finds square the message is telling me to look for*
*finds phrase spelled out with that square*
Me: "Ummmm... OK..."
*checks to see if that's the right answer*
Me: "OK, not the right answer, but if I do this... aha!"
*checks again*
Me: "Woohoo! I got it!"

Do all the five-letter words, if you start from the right column, make words themselves? Like the first one could possibly make

but "trans" and "distr" aren't words...

"Trans" and "distr" aren't words, but they almost are... Maybe you're still missing something?

I know that you've to add six letters, but I was wondering if it's trial and error to get where to start when figuring out the five letters to which I must add six, or if the five letters also make up words.

There are six frames. What I did was take screencaps of all the frames, in order. It isn't necessary to have them in order, but it can help.

#1: Though easy, took me a few seconds to get into the mindset (I'm tired :P).

#2: Once in the mindset, super-easy as well. Even easier than the first.

#3: Starting to get hard... I didn't get what to do without a hint to understand the format (I figured they were words, but wasn't sure quite how it worked).

#4: Wasted a bunch of time figuring out all the words and noticing the mistakes in the six words (that ended up meaning nothing: I got "soumad" as an initial answer, and I was, indeed, mad). I didn't even notice the screen of "instructions" within letters - too lazy to download and dissect the frames this time around. Once a hint pointed that out, it was pretty easy to figure out which word I wanted. Though I'd have had no idea whether it was what was the "correct" final answer if a gif hadn't been uploaded for that word.

All in all, way-too-easy start, alright puzzle for #3, and too much red-herring-ness/needing to download and dissect the gif for my liking in #4.

Fruity?

Don't blink.

Many frames! And empty boxes?

Aargh! I need a message here, guys!

one of the earlier puzzles had a two-word answer, and if you follow the instructions on #4 you can come up with the correct answer, or an incorrect two-word answer.

have the final word that works with all 3;

but it doesn't seem to work on its own, or with trans.

If this were a game of Mastermind, I would give you four red pegs and one white.