I know many of the videos I watch have hashtags at the bottom of their descriptions. So I'd imagine hashtags like #flightsim, #multiplayer, #WWIIcombatsim and the like would help with the search algorithm and getting views.
I recently searched "pork shoulder crockpot" and such a simple somewhat nebulous phrase yielded a ton of recipes probably due to hashtags.
Doing some pulled pork tomorrow in fact because of my findings.