Maybe everyone else already knows this but I just discovered that YouTube.com has an option on the comments feature that requires all posts to be approved, not by YouTube, but by the owner of the video.

There are promotional/propoganda videos by many of our notorious groups (Landmark, Impact, Release Technique.) Naturally, comments critical of the videos are not approved by the owner of the video.

The fact that comments must be approved is not evident unless you attempt to post. This could lead people to erroneously conclude that a video received only glowing reviews.

I have asked YouTube to show on the screen when the owner of a video has elected to post only comments it approves. If you agree that this is a good idea, please ask YouTube to do this.