Originally Posted by volosong

On that particular bike, I'm using a top-tube bag. Using a top-tube bag is supposed to be very Fred-like. I don't care. Like you say, don't leave home without it, (spare tube, irons, etc.).

Stupid me, I stripped the bolt and can't figure out how to remove the bracket. Not the bolt threads, like I normally do. I stripped the Allen-head hex at the top of the bolt. Maybe I could drill a slot using my Dremel and use a flat-blade screwdriver?

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Do some test rides. I'd guess that a camera strapped to your seat bag will result in pretty jittery video. You are going to want something more solid/stable. Bags are going to "bounce" around a little bit.