How (flash, video, etc., etc.) can you insert animation on the site so that the whole thing supports the alpha channel?

Question

HTML

1. gif is swept away for 256 colors
   
2. flash does not support
   
3. I don’t know about the video, but it’s also unlikely, right?
   

In general, the only thing that came to mind was to run the storyboard in .png via js. If yes, then tell me, maybe there are ready-made plugins. Or is there some other alternative after all?

Answer 1

Maybe just use any HTML5 game development framework and paste the sprite?

Answer 2

If the animation is more or less simple, you can render in <canvas>, it supports the alpha channel.