hmmm, doers and critics !!
Aye mate, I come across quite a few 'critics' during my years of 'doing' actual real training courses when I was teaching the skills to real customers, I listened to every comment made took it on board, whether good or bad.
However, I've never felt the need to learn how to video myself, set up a YT account and upload films of myself showing the world what it's missing, allways preferred the 'contact' side to my 'doing', it's very satisfying teaching students in the setting and watching 'them' acheive what your teaching, to me thats what it's about.
I found the challenge of setting up a school teaching the skills to real people and taking them into jungles, arctic mountains and tundra, dessert, bush, etc and 'doing' the skills a lot more appealing, but then again, You Tube wasn't even around when I first did 'did' that, heck, I didn't even have a website for 4 years - I'll leave the YT vids to people with better camera and IT skills than me.
I agree with Toddy, just because people trip in as the next expert on YT doesn't mean to say they are expert instructors, teaching the skills to real students is very different to getting your mate to film you and upload it on the web.