Questor, I have never tried this.
But I did a Copernic search this morning, and I have turned up a TON of hits on this site, and not a single negative one. I would conclude that it is genuine, and no one has any complaints about it. It is written by a kid named Ho who has a TON of sites, and nothing negative that I can find.
I would not be afraid to try it -
Check the ratings here:
http://www.stumbleupon.com/url/www.videodl.org/