Why does Youtube delete posts?

[Rev. Rye]

Are we talking about videos, community posts, or comments? Because I'm sure there's different explanations for all three.

I am talking about comments. I'm not sure what a community post is.

There are other people who make comments and sometimes I reply to them. They reply back to me.

It seems to be random. Sometimes a long comment of mine gets through and sometimes not.
If a long comment doesn't go through, I break the post into multiple parts.
I reply with 2 sentences at a time.

At one point, the other person was doing the same thing as me.

So, are we sure this is something distinct from normal comment moderation?

Community Posts would be something like this where the channel in question has something to say, but doesn't want to make a video about it.