Breathless (1960) was a French New Wave film based around a main character of Michel Poiccard who is a serial thief. He constantly goes around stealing cars and stealing from those who trust him.

The film was a bit slow for me, but that is like what most films of the age are like, spending alot of time on character development and interaction that isn't necessity to the story. These movies play more like novels than short stories, adding fluff than succinct action, but at the same time they are pushing in that direction. By quickly cutting things such as the car in motion and the sex scene etc alot of fluff is avoided and we go strait into the action.

Alot of jump cuts were used by necessity as of it's adlibed and live action.

Now days we have mockumentaries which have ad-libed and live action, reality tv that is partly scripted, modern movies quickly cutting through content, these movies and their techniques started from these live and rapidly made movies.