

Alright, so following the mail metaphor: lemmy is unable to send a video attachment so it can’t allow you to upload videos to peertube; however, activity pub could allow for that
I’m not sure that would be the correct metaphore. Lemmy can send video attachement. But your lemmy account is not allowed to upload video to peertube so you can’t send any video.
There is also an economical reason : a video is ressource hungry.
So it is limited to watching peertube video. Let’s imagine 1000 lemmy users uploading video to peertube…
For an alternative to Mastodon, and maybe facebook, i recommand iceshrimp. It’s a misskey fork with markdown, 3000 chars, emojis reaction, list, gallery management…
Two alternatives to lemmy. They have lot interresting features : mbin and piefed.
As for pixelfed, lot users reported me some bug. I have heard of vernissage but i haven’t tested them.