The creator of pixelfed is working on a tiktok alternative loops, although for now it’s in private beta.
For a starting point that is available now, you could look at Pixeldroid, an open source pixelfed app.
Besides the ones already mentioned:
The FSF has some channels at https://framatube.org/a/fsf
There’s a bunch of KDE related channels at https://tube.kockatoo.org
Blender has several channels at https://video.blender.org
https://peertube.touhoppai.moe/a/shichimi has Krita tutorials from the creator of the Pepper and Carrot webcomic.
https://tilvids.com/a/martin_owens from someone who works on Inkscape.
https://tilvids.com/a/togglejam looks at the science behind fictional games and shows.
https://diode.zone/c/andrewtropin has a bunch of scheme and guix related videos
There’s some anarchist channels on https://kolektiva.media like CrimethInc and subMedia.
A couple of gaming related accounts/channels:
There’s also sepiasearch.org for PeerTube videos.
There’s a list of people that have agreed to block it at https://fedipact.online/
None of the options are that great right now. I still mostly use Jerboa, and go to the PWA for things that don’t work. Other android apps you can check out are thunder that has an alpha out, memmy which only has an iOS beta so far, but plans to be cross-platform, and lemmur which is outdated and is incompatible with current lemmy, although there’s a fork with more recent development so it could possibly come back at some point.
I’ve had it freeze up on me several times, where I had to reset the app to get it working again. It works most of the time, but I wouldn’t recommend it yet for general use.