A few of my friends have been doing this and I noticed na mostly sa kanila eh never pa na-try mag-sulat or mag-blog at all.
They have the gears and all - cameras, editing softwares, etc. - so I guess that makes it more genuine kasi you're expressing your thoughts on that instant moment with your subject or topic.
Downside lang nun is if you're not happy enough with your content or stories, you have to do more retakes for this (if you still have a chance); otherwise, no way to do a retake.