deltoidjohn
Veteran
You put the strap over your shoulder the way you'd wear a messenger bag. I've seen people put the strap over both shoulders. Depending on how tight the strap is, body type, preference etc., the bag ends up around your ribs/stomach/waist and you can move it completely from the side to more front on. I briefly worked on a TV drama recently and the DP shot like this a lot of the time.
^This^