,1,All film & TV examples are without sound and for educational purposes only (FAIR USE). My own films can have sound.
There is an easy way to make one actor play more than one role in the same scene. Newer visual effects can be more advanced, but it's not that difficult to do, with the right planning. Scene list below:
00:00 - intro
00:48 - body doubles
01:44 - OTS shots (over the shoulder)
02:20 - a common element
02:45 - matching eyelines
03:09 - different hair, props, wardrobe, etc
03:37 - reaction shots
04:18 - shoot one character at a time
05:35 - notable examples in film & TV