Make planets have a transparent background

[Velorum6]

I didn't know how to use webm for the planets, so I transformed the webm files into gifs and added them then, I think it's in some way a fix but it has some downsides, lower quality & the background is not transparent, would be good if there is a way to make it better, I know it should be possible since in valhalla.zkga.me they're doing it well

[Velorum6]

Solved the problem of having WEBM instead of GIF, so we now have better quality, problem now: WEBM files are not transparent, would be a really big improvement if we remove the backgrounds of these webm files