First, a discussion about the rules is not breaking any rule and this post will conform to all of the rules as stated.
Second, lets begin.
YouTube is a family website. Each account has the option to put up a "Safety Mode," while in this mode the comment section is blocked. If you fail to use a feature that is given to you to block out unwanted content, then that is the same as saying you do not mind what you see/read regardless of what it is. Most importantly because this site allows instant feedback without screening it is absurd, imho, to try and moderate another website because of this feature. Anyone of us can describe the video, by providing the exact name and position on the website... this by itself is the same as posting a link but yet these methods of sharing information is allowed.
6- Posting pornographic or generally offensive text, images, links, etc. will not be tolerated. This includes attempts to bypass the profanity filter.
The link to a youtube video is not offensive.
There are no rules stating that if you want to share information using other sites as the source, then that website and all content posted must also conform to the BBS rules.
If there were such a rule, then websites including Wikipedia, which btw posts nude photos and other graphic images, would also have to be banned from linking here at the BBS.
I would make a suggestion to make it mandatory that the poster of the topic warn before hand that comments or videos contain language. That way we can have an exchange of ideas without breaking anyone elses feelings.
Again I am not acting like a backseat monitor, I am just stating my opinion in a normal manner about an unofficial rule that is being applied.