Here are a couple tips to improve the usability of peertube.
Use sepiasearch when finding new peertube instances and videos. Some browsers such as firefox allows you to create a shortcut for searching
Subscribe to channels through your most used fediverse account. Then it will pop up in your feed and it’s easier to comment on videos.
Weird, i omitted the first @, but I still get:
“Error Cannot fetch information of this remote account”
Are you trying from Mastodon or Peertube ? Maybe the instance owner blocked federation with an instance ? For Mastodon I like using the search box, with the user info showing up in the middle and a follow button, instead of going for the option of another browser tab open for a remote follow.
Hm, have you tried from another peertube instance?
If that doesn’t work, have you tried subscribing from mastodon instead? I wrote instructions in an earlier reply.