Scirra's forum is about Construct Classic and Construct2. There's already an "Open" section for "out of topic" subjects.
If you need informations, tutorials or how to's about other technologies/softwares, go make a search on google, look for forums about those softwares. I don't think scirra's forum is the right place for such informations.
I agree though that videos of games or related to construct should be added to scirra's playlist on youtube.
On the other hand, apparently noone/not enough persons with such a video took the time to give them a notice.
So here it is, if someone has a youtube video construct related post about it in the forum or send a message to scirra's youtube channel. They'll be happy to hear about it, possibly add it to their playlist and possibly promote it.
I don't think an entirely new section is required for those videos, and if you look at construct-classic part of the forum, videos of games are all stored in a sticky thread.
One such thread could be made in C2's part too, but so far, few people posted videos about their games, as HTML5 makes it quicker to play the game rather than see a video about it.
And videos about how to use C2, you can see them in the tutorial part. Sure it's not clearly indicated before you check the tutorial itself, but when you're looking for informations, aren't you looking through them anyway ? If no, then you should.
One last note: I'm not talking on Scirra's behalf, just giving my own opinion there.