Channels on PeerTube are already Communities on here so there is no need to tag something for videos to show up as long as somebody subscribes to the channel. If you search for a specific video on your instance it should show up with comments from across the Fediverse. (e.g.: https://makertube.net/videos/watch/b82221ac-53b2-4b72-94f7-4d1ee436cce1) However you can still crosspost the videos in more specific Communites. Comments are then aggregated from different Posts on Piefed and I think Lemmy 1.0
Channels on PeerTube are already Communities on here so there is no need to tag something for videos to show up as long as somebody subscribes to the channel. If you search for a specific video on your instance it should show up with comments from across the Fediverse. (e.g.: https://makertube.net/videos/watch/b82221ac-53b2-4b72-94f7-4d1ee436cce1) However you can still crosspost the videos in more specific Communites. Comments are then aggregated from different Posts on Piefed and I think Lemmy 1.0