Ok, I go to Xtube, search for "bi" and find this first thing:
http://www.XTube.com/play_re.php?v=9...cl=0YeuR7dCNDM
It's pretty crappy quality but just what everybody says they are looking for.
On the other hand I did not find another vid like this one. Just a lot more vids tagged bi but instead showing guys getting fucked by a chick with a dildo or just plain gay vids.
Got any tips for better search terms, 1dick1?