I bought some fairly inexpensive clamps on Amazon, and I mount then up around the stage and out of the way of everyone. Then just hit record on the app and let them do their thing for the night, since all the gigs we run are collective gigs I record all the bands of the night, so they require a little bit of moving through the night, but not much. Then you can bring them into your editing software, sync it all and then you can just do a multicam edit, which is really handy as far as editing goes. You're essentially just listening to it, and clicking on each camera to the beat of the particular song, and if you're not happy, you can go back at make some minor changes.

Its a game changer, I think it would be worth checking out CEX to see if you can get a few. I just finished editing my bands performance and now we potentially have 11 songs to throw up on social media