I've not seen the vids of this guy, so can't comment on this particular case. End of day if your doing something illegal, filming it , and posting up it up on Youtube or forums, your leaving yourself wide open to get nicked, be it having a banned bread of dog, messing with kids, bullying, flogging nicked gear, etc.
Of course the poilce monitor these sites, and no doubt get tipped off, anyone can see what's posted on a forum, without being a member, and anyone can view the likes of Youtube. If your promoting and posting up illegal activities, whatever they are, you put yourself at risk of being nicked. Its modern policing , modern crimes are internet based. Thieves use the net as well, get peeps details and nick bikes from info posted on forums, ie they can see where your gunna meet with that brand new zx10r and follow you home. Its equally not wise to post up personal details where you can track down where you live and registration numbers on pics you post can be used to clone bikes.
Simple answer, if you don't want to get nicked, either don't do it, or don't post up on the internet bragging about it, and if you don't want your identify nicked, or your house robbed, don't post up personal details, Police, thieves and grasses have access to the internet.
Must go now, I'm going to rob a bank, and don't forget my phone number is in another post, if you want to buy my bike, there's a pic there to, with the reg number showing ! lol. (only joking Mr Fed, or Mr Thief, if your reading this )