In case you missed it, the themed playlists of PeerTube videos on Fedi.Video are now in chronological order with the latest at the top. If you want to browse a topic, click on the playlist:
Each playlist indicates when it was last updated.
There are also lots more playlists which aren't on the front page which you can find listed here:
️ https://social.growyourown.services/@FediVideo/114506411010977913
You can also search with keywords using the search box at the top of the page.