I've shot plenty of content on the road and learned pretty quick that the camera bodies everyone's talking about are honestly similar enough that what matters more is the lens situation and your workflow. The ones mentioned are good, but here's something worth considering: battery life gets real important when you're doing longer sessions. The Sony A6700 and Canon R50 both drain batteries faster than you'd expect during extended recording, especially in heat. If you're planning multi-hour shooting days, factor in spare batteries and a charger that doesn't require a wall outlet.
One thing that doesn't get enough attention is the autofocus behavior during video. Both cameras have solid autofocus, sure, but Sony's tends to hunt a bit more if you're panning or dealing with complex backgrounds. Canon's AF is smoother for that stuff in my experience. That said, neither will let you down for YouTube content - you're not pixel-peeping at home footage anyway. The bigger question is whether you already own lenses from one system or have friends with gear you can borrow. Starting fresh into Sony or Canon matters less than building a lens collection that doesn't bankrupt you down the road.