As far as breadth of topics...you are correct, it's still very FOSS-heavy. That said, we do have some other interesting channels worth following. Here are a few:

Yesterkitchen, dedicated to the history behind recipes! https://tilvids.com/c/yesterkitchen_channel

Let's Talk Philosophy, focused on learning about great philosophers from history! https://tilvids.com/c/letstalkphilosophy_channel

ArtsHole, who covers artists throughout history! https://tilvids.com/c/theartshole_channel

FastPassFacts is dedicated to talking about different historical/social topics from theme parks. https://tilvids.com/c/fastpassfacts_channel

The big challenge is trying to find creators who are willing to use a video site that doesn't have direct monetization. I can talk to them until I'm blue in the face about the importance of controlling your own means of hosting and distribution, etc. but at the end of the day, making content takes a ton of time. They won't do it unless people are watching. So if you want to support alternative platforms, the best thing you can do is USE them, and reach out to your favorite content creators and let them know that you're using them.

i literally remember this guy coming on peertube github and reading about him explaining how he was planning to set up a educational instance.

anyway, as i said, this is an experiment supposed to urge more people to take the plunge into becoming hosts and managing their communities. If there is a bad apple down the road, the community can self adjust accordingly.

the point is, people need to be aware about choice. this is doing a good job