[spadufed]

I haven't seen anybody else talk about what the experience of following somebody from another service is like on the user-end.

Following pixelfed accounts from Mastodon is actually fairly straightforward. You simply see them as a tweetlike message with an image attached. One caveat there is that Mastodon does not allow for as many attached images as pixelfed, and I believe will simply drop any images after a certain point (I want to say max size is 4).

Following a peertube account or channel (you can do either) will show a post whenever new videos are uploaded. You can find the OP on mastodon at https://mastodon.social/@[e-mail]. One neat bit of functionality is that if you put all of your peertube follows into a single list, you've basically got a chronological subscribed page (a la youtube). Also take note that comments can be left on either the peertube site or from within mastodon.