You are right LE, it doesn't fit the rules, but as it is on youtube and you put that link here I think it's ok.
We can't be responsible for everything that's on the internet worldwide and we can't check every link to see if everything in there is legal or not. I think PC is paid to do that kind of job
I think that should be done with a good deal of caution. This forum and YT are not under the same status.
Linking to illegal material posted on YT is not necessary safe for the forum. Moreover PC is not the only right holders representative.
To date it is usual that the right holder will send a DMCA to YT so the "offensive" video is banned and things does not go further.
But this is still a grey aeria and linking to illegal material can be seen as an infrigment (depending on the law the forum is under).