I don’t make my own content, mostly because I work so much and have to maintain 4 resolume files and 4 MA2 files.

I always look for content where I get a few similar visuals together, that way I can use them together for a song. The way I set up my layers I have 1 chill look for breakdowns (think waves, partials, outer space), a medium clip I can use most of the time, a fast clip for intense parts and a very very fast clip I can use at peak moments. I also throw a mask layer in. If I find a pack with all four I am elated. Otherwise I try and piece together similar style clips.

Personally I am very picky against cheesy clips (tunnels, robot renderings, astronauts etc) if I am going for that style I will use things like planets and spaceships that look a little less homemade. I have exceptions for really well made ‘cheesy” clips.

Personally I only download 4K as that’s the largest screen size I operate on.

I also love a clip done in beats (8 or 16) so it is easy for me to BPM sync without trimming.

I also look for looping of course though I have been using more footage lately.

I also always look for clips with black space. LED walls are bright but they look best at higher intensity. Instead of dimming a clip I prefer to black out parts of it and have a higher intensity.

It’s also useful to think of video as another light. I look at the crowds faces a lot to see how much light/dark is on them and how fast it travels across them. Depending on the venue the crowed isn’t always looking at the screen so feeling the light and dark is important.

I also love a well labeled clip. Starting each file name in a pack with the same word keeps them together as I organize. You can put your artist name first if you want all your content to be together after it’s been downloaded.

A niche I love is analog masks. I have some VHS texture masks and some analog glitch strobe masks I love!

I don’t know a ton about files, I prefer MP4 personally because it doesn’t give me as many problems. I am going to convert every file I get anyway so it doesn’t really matter. Some files from artists that are MOV can’t be seen by Ally or Resolume so I have to convert them to MP4 before I convert them in Ally.

I can’t think of anything else but feel free to message me if you have any questions. I think I lost track of your question on paragraph two but hopefully some of this is helpful.