How would i be able to play a custom video in my roblox game without uploading 500 frames?

[refeia (seii)]

You should probably keep it as 20 fps since roblox has a resolution cap, it won’t get too laggy.

If you don’t care about resolution you could use a sprite-sheet.
Basically just turn the mp4 to a gif and leave it as a sprite sheet. Just a few fair words of warning, normally each frame will be less than 100 pixels if you do that.

Here’s a thread about sprite-sheet gifs.