You can import any torrent file that points to a mp4 file. You should make sure you have diffusion rights over the content it points to, otherwise it could cause legal trouble to yourself and your instance.
You can import any URL <x id="START_LINK" ctype="x-a" equiv-text="<a>"/>supported by youtube-dl<x id="CLOSE_LINK" ctype="x-a" equiv-text="</a>"/> or URL that points to a raw MP4 file. You should make sure you have diffusion rights over the content it points to, otherwise it could cause legal trouble to yourself and your instance.
You can comment using an account on any ActivityPub-compatible instance. On most platforms, you can find the video by typing its URL in the search bar and then comment it from within the software's interface.
You can subscribe to the channel via any ActivityPub-capable fediverse instance.<x id="LINE_BREAK" ctype="lb" equiv-text="<br/>"/><x id="LINE_BREAK" ctype="lb" equiv-text="<br/>"/> For instance with Mastodon or Pleroma you can type the channel URL in the search box and subscribe there.
Sorry but there was an issue with the external login process. Please <x id="START_LINK" ctype="x-a" equiv-text="<a>"/>contact an administrator<x id="CLOSE_LINK" ctype="x-a" equiv-text="</a>"/>.
An HTTP request has to be sent on each tracker for each video to spy. If we want to spy all PeerTube's videos, we have to send as many requests as there are videos (so potentially a lot)