I don't know how an embedded video is any less helpful for the "visual content of this forum" than an embedded picture would be.

But anyway, when people go to the effort to expend hundreds of hours of their time making tutorial and entertainment information for others, it's great.

Personally, I never upload content directly to any of the forums I frequent on any topic. I either use imgur for images or I use YouTube for videos. Then I embed the URLs in posts. It saves storage costs for the forum operators and it makes it easy to share the content in other places.

Steve