If you think you want to start fresh, then just do ahead and do it.
I've never thought of it though. That said, I never started a channel with goals/objectives/concepts/etc. I just wanted a place to dump my videos so that my hard drive wasn't full, and easy to share with friends instead of copying files to USB/etc. Till today I still have my very first vids back in 2011 (yes that is 2-0-1-1) up for views. Cheap China made camera strapped on with electrical tape, bad vibrations, bad sound. I don't really care though. The memories (for me) when I re-watch them is priceless. That's what my purpose was when posting up videos was anyway.
I guess that's one of major differences with the new generation of channels, all wanting to be something great that appeals to the masses or something like that.