>First of all, the video uploader is promoting a competitor to YouTube. This is not disclaimed clearly.

If you're referring to the nebula ad at the end, he and other youtubers have been advertising it for months, if not years now. No other video with a nebula ad has been shadow banned like this.

Also, trying to paint this as "Youtube isn't promoting it" is disingenuous. Youtube is hiding it from people who've explicitly asked to be notified about his videos.