There really aren't that many active peertube channels. Here's all the non-linux channels I could find:

https://piefed.social/c/blitzcitydiy_channel@makertube.net - electronics and music

https://piefed.social/c/simon.caine_channel@tilvids.com - general technology

https://piefed.social/c/thunderbird_channel@tilvids.com - thunderbird email client

https://piefed.social/c/ewen@makertube.net - photography

https://piefed.social/c/icesheets_climate@tilvids.com - climate

https://piefed.social/c/shifter_cycling@video.canadiancivil.com - cycling

https://piefed.social/c/transit@video.canadiancivil.com - transit

https://piefed.social/c/urbanism@video.canadiancivil.com - urbanism

https://piefed.social/c/coreyartusimagery@makertube.net - art

https://piefed.social/c/dot_social@flipboard.video - fediverse podcast

https://piefed.social/c/thegiddystitcher@makertube.net - crafting

https://piefed.social/c/linuxappsummit@tube.kockatoo.org

https://piefed.social/c/submedia_channel@kolektiva.media - anarchy

https://piefed.social/c/solarpunk@kolektiva.media - documentaries

https://piefed.social/c/boilingsteam@peertube.linuxrocks.online - gaming

https://piefed.social/c/justsomeguy@comics.peertube.biz - comics and movies

https://piefed.social/c/comicuno@comics.peertube.biz - comics

https://piefed.social/c/blender_channel@video.blender.org - blender

https://piefed.social/c/4742f338-1ded-4798-bd85-93e8de367476@peertube.touhoppai.moe - krita tutorials

You're not doing it wrong. It's just a bit like that at the moment.

What Peertube needs is for other Fediverse platforms to build in a filter so only posts which contain video are displayed.

Peertube posts do federate but because there are way less videos produced than text and image posts (for obvious reasons) they are drowned out. Filtering by content type seems like the obvious solution. This is how Pixelfed works (but for still images), so it's clearly possible.

My feeling is that we're still in the first iteration of the Fediverse, where it's mostly trying to replace the functionality of corporate platforms. Which I think has mostly been achieved now. Hopefully it will start leaning into its unique strengths now and become really innovative.

Of course there is also the issue of adoption and Peertube has had less publicity than Mastodon and Lemmy, so it's understandable that there is less content. If you can, contact your favourite youtubers and ask them to start a Peertube channel. If enough of us do this it starts to become a thing :)

Commenting to register my interest.

I will confess that I was tempted to throw some snarky comment about Linux, but I got over the urge.

So I feel like I’m doing peertube wrong. I’m trying to find good content, but it feels like every single instance I find is just “here’s the linux news, here’s the new linux tips, here’s the linux gossip, linux linux linux!” And I do not give a shit about linux. I just want to find the non-tech, non-video game content.

There's also https://pony.tube ;-)

Doesn't look like it. There doesn't seem to be much of anything about discovering compatible things on other fediverse platforms (e.g. MBIN magazines, a.gup.pe groups, pixelfed groups [if they even exist], PeerTube channels, discourse / hubzilla whatevers, Flipboard thingies, etc).

For PeerTube, a good discovery tool is https://fedi.video, but that also involves tootling around on some other instance and copy/pasting handles back to your own platform, so it's not exactly that convenient.