Sorry for the slow response Atze. I used Adobe Premiere Pro CC 2015 to sync the three video angles. All the video was show with GoPros, with live audio added from a Zoom H1. In Premiere you can line up the three videos from a hand clap or other sharp audio cue, the set the software to show you multiple video monitors and just click on the angle you like as you go. Hope this helps! I have videos about how I do it on my YouTube channel if you'd like me to send you a link.

Thanks so much for the kind comments - Tony