> Let people discuss videos on other sites like twitter or reddit.
Yes, exactly. I've never understood why content-host sites seem to think attaching first-party comment hosting directly to hosted content is a good idea.
Why not just host what you host, and then let aggregator/discussion sites (various subreddits, various private forums, Usenet, Slack/Discord groups, etc.†) link to your thing-that-you host and host comments? You can have RSS feeds to ensure those aggregator sites can—if they want—automatically generate their own link-posts when your site has a new post.
And, best of all (from my perspective, at least), it doesn't force people who are consuming your content for different reasons into the same room where they will inevitably shout over one-another due to competing access needs. Each community can have their own conversation about your content, and can feel morally justified in kicking out uncivil people, since they can just go find a different conversation about the same thing in a different community. Rather than there being one "canonical" conversation that they feel shut out of.
† I exclude Twitter from this list because Twitter has no concept of partitioned subcommunities, and so inevitably, if there's a conversation about something on Twitter, it becomes the "canonical" conversation. That's kind of the point of Twitter, for some use-cases (e.g. celebrities arguing with other celebrities where other celebrities can watch and get pulled in), but it's bad for the use-case of regular people trying to have a regular discussion.