Dewch i brocio'r cof yng nghwmni John Hardy, wrth i ni edrych ar newid byd. John Hardy heads back to the bygone years.
Discover 11,128,835 listings and 277,896 playable programmes from the BBC
Dewch i brocio'r cof yng nghwmni John Hardy, wrth i ni edrych ar newid byd. John Hardy heads back to the bygone years.