Basic filmmaking techniques you can use with only two people.

Vimeo Video School demonstrates tips and tricks for making videos with only two people (both in front of and behind the camera, in total) – swipe cut, split screen, and smartphone audio:

Further Viewing

In-camera transitions, together with meticulously-planned shots and sound design, are used to great storytelling effect in this 30-second sequence from Hot Fuzz (2007) (which we look at in more detail here):