Sorry to resurrect an ancient thread, but I thought I would add my experience here in case it helps someone.
I'm using an A20 on the Sony handlebar bracket. I had it mounted so I could see the Garmin, but the Garmin screen is too reflective and I couldn't be bothered to get a piece of anti reflective film to sort it out. The idea was to track speed and location (distance) from rides for my own information. You can buy cams with GPS and suitable software so that can be solved in a more hi tech way if it becomes important. I have since turned the mount around so the tripod mount is in front of the handlebars and the view is just of the road ahead.
Problems encountered:Unit stopped recording
. This is a known problem of the battery coming loose solved by wrapping the battery with a little electric tape to make it a snug fit. Fogging
. A real problem where I live where the humidity is ridiculous. Anti fog sheets proved useless so I have drilled two small holes below the tripod mount at the rear of the case. If you have a look at your case you can see this is actually protected and should be OK with respect to water ingress on the handlebars but obviously the case is no longer waterproof. I'll get another case if I ever decide to take it swimming.Vibration
. Some roads are in such poor shape the recorded video is useless. I'm on 23mm tires and intend to go 25mm when they need replacing. I'm guessing this in not the answer but it couldn't hurt. Wet weather
. The video quality is affected by water pooling on the lens cover. This was solved with rainex applied to the lens cover although before you do this you should do your own tests and be comfortable that this won't damage the case. I had no issues but the manufacturer says its not recommended for application to plastic. I try not to ride in the rain anyway but it seems to work OK at repelling water while riding.
Native video quality is excellent but rendering needs to be done carefully so as to not mangle it completely and not have a massive file. There's a bit to learn about youtube as well to be able to force HD so your video is seen as intended.
Here's a small selection of videos of various quality with what I have learned applied along the way. The Bellthorpe video is prior to the rainex discovery (obviously), it was really bucketing down that day and would have made a big difference.Videos