did HT pay him or did he do it off his own back??
either way this whole youtuber celebrity thing is how to get down with the kids. Shame he didn't have a decent sound pack or graphics turned up.
Some even sit and watch OTHER people play video games rather than play themself. To me that is just weird but I can think of one guy that would pay $$$ just to watch me fly 24/7 
I don't get the impression from the video that it was paid for, but if HTC paid him, it was money well-spent. I'm one who likes to watch player videos of game action - so I can get a sense of a game before investing any time or money. Have you seen Jester814's ArmaIII videos? Very realistic game experiences.
In the case of DevilDogGamer's AH videos, its just cool to see new people having such a good time in the game. Can you tell, though - are they using TeamSpeak or the game's on voicecomms? Seems to me I heard multiple voices talking at same time, and I didn't think that was possible with the game's voicecomms...