If you're looking to make your desktop background more dynamic, you should try embedding a video with the open source app Lively Wallpaper.

Aside from the free Japanese art and Pixar backgrounds available for download, you can also get backgrounds from your favourite Japanese anime, video games and movies including Pokémon, Godzilla ...

However, these sites offer up actually good, actually free videos that make for worthwhile inclusions into the Virtual Backgrounds section of your Zoom software.