Why a bike camera is different
A car dash cam sits in a dry cabin on soft mounts. A bike camera is exposed to rain and road spray, bolted to a frame that vibrates constantly, and has to be operated by someone wearing gloves. Sealing, vibration tolerance and a remote or handlebar control are the three things that separate a proper bike unit from a car camera on a bracket.
Mounting position decides your footage. Fairing or handlebar mounts give a stable view of the road; helmet mounts follow where you look but pick up more movement. Check the recording resolution against what you need. Enough to read a plate in traffic is the usual benchmark.
Related
For a car instead, see dash cameras. For filming rides rather than capturing incidents, see action cameras. Both need a memory card that tolerates constant overwriting.
Common questions
Will it survive rain? Yes. These are sealed units rated for full weather exposure, unlike car cameras.
Can I use it with gloves on? Most include a bar-mounted remote or oversized controls for exactly that.