>>3383828Sounds like you've got it. For every job you need to adapt on the day. Do a couple of these and you'll start getting the hang of it. Oh also make sure both cameras are set to the same colour temp. And be aware that different manufacturers have different colour science so you might need to grade a touch afterwards to get them to both look the same.
As for light, the majority of concerts look like aids. Its fine if you're at the gig drunk and seeing your mate's band, but for photography/video its terrible. Just do your best to make sure the subject is exposed. Don't worry about the background, just your subject.
>>3383831You sync it up in the edit. You can find hundreds of videos and examples online. Its the first and foremost thing you do. If using premiere the (m) shortcut key will create a marker. Do this for the audio and video, scrub through and find something pronounced (like the first line someone says or the first drum kick). Put in the markers and sync them together.
You know in films how they have a slate and click it? That click is for the editor to sync the vision and audio.