DaVinci Resolve has a native Linux version, with the caveat that it can't import mp4 files (have to convert them to another format beforehand with a tool like ffmpeg.) You also may have to do some tinkering based on your hardware - Arch Wiki has a good compatibility table, though the Debian packages will probably not match what Arch Wiki has listed, and you'll need to use the installer from the Resolve website since I don't think Debian has it in their repos.

If you're looking for something free & open source, Kdenlive is also a great option, though it doesn't have nearly as much functionality as its more professional-grade counterparts.

Nspires are great but don't think they have a touchscreen where you can drag the graph around and zoom desmos style like the prime does (I hate adjusting graph windows I hate adjusting graph windows)

Looks like there's a GitHub issue open for this, though it hasn't had activity for a while. I think it makes a lot of sense to weight smaller communities higher, at least in the subscribed feed where users may want to see more posts from smaller communities they specifically subscribe to.

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