Trooper is making more than you guys think on youtube ad revenue.
I'm estimating that his vids avg ~20k views (after a quick skim of his channel).
Adsense pays $18 per 1000 views on avg (I'll put link in spoiler at bottom).
That's $360 per vid, and he makes a **** ton of vids... at 30 vids per month he could be receiving $10k/mo from adsense. This sounds higher than what his lifestyle betrays... but, the money from adsense is surely much more than his poker losses.
He's not great at poker, but he has to player poker to make a storyline for the vids. It looks to me like he came to Vegas to be a pro poker player, but fell into being a pro youtuber who uses poker as his story.