It depends on what I'm using to time my solves. If I'm using my stackmat timer, then I don't use inspection, but I try to keep my inspection short-ish. If I'm using the Cube Timer app on my phone, then I will use the 15 seconds for inspection.
I'm sitting around 113 right now. It's not a cubing channel but it does have some cubing videos (although the camera angle is horrendous). It's more of a gaming channel but I have some non-gaming videos.