I do, watching them helps me fall asleep from boredom. after a ride, I'll edit a a cpl minutes together & throw them up on youtube, then delete them from my camera card. no need to save stuff I'll never watch

but seriously
I turn my cam on & off as I ride. better to edit in the camera rather than have enormous single files to deal with
I try not to turn on the camera when it is in my pocket ... DOH!
I record intersections & areas that are highlights for me, like sections I affectionately label as "kill zones"
other highlights for me are tricky traffic sections
for my own memory sake, it's helpful to edit a final cut that represents the entire commute
I do sometimes upload to youtube single clips of a particular highlight because the rest of the ride had nothing to offer, or because I wanted to share that highlight on one of the threads here
I have found it useful to review my riding behavior to be safer
if you don't mind getting flamed, share them on a thread & see if anyone has anything to offer. I had a particular hill I was riding too recklessly & it was good to get a kick in the pants here
I have decided that 1-4 minutes is tolerable where the connected clips are 5-30 seconds long
it's more interesting to add titles & captions
I don't load the files onto any computer for editing, I just connect the camera & let the program suck it in for the editing session. I save the final movie to a computer then upload it. when it's working I delete the final cut from my computer

this is my 22 mile commute home. I don't recommend watching it