I usually film in 1080p @60FPS/Wide with ProTune on. This Hero 3+ Silver fits the bill if you are looking for a cheaper alternative. Hearing other YouTubers talk, I would stay clear of the Hero 5 for now.
The Chestie is the base for all of the footage.
I know it is not the best choice, but I use my cell phone for most of the Vlog portions of my videos.