Dashcams have got more sophisticated now some operate via your mobile phone
Halfords do a selection at reasonable price but if they fit to the car they charge 100 quid as do garages the one I have in my car is old now but still great just plug into the cigarette lighter
The one I had on the bike is a Victure like a small Go Pro simple to use runs off its own batteries and comes with loads of fittings that fit most bikes simple to operate ..at the time it cost about £35