How to sync video from multiple takes to master audio?

[clarkleach]

I'm a total noob with Reaper and DAW software in general. I'd like to make music videos with multiple instruments and takes. I need to know how to sync all these various video takes with the master audio.

One method that has come to mind is to have a click track "count off" at the beginning of the audio track and somehow record that audio along with the video. Then it's just a matter of aligning the clicks on the several video sources in whatever video editing software is used (I'm currently using Lightworks). It's the "somehow" that has me stumped at this point. So... is there a way to have the monitors on for only the first few bars AND still be able to monitor with headphones? Am I even on the right track here (no pun intended) ??

How do you do it?

I'm using a Focusrite 2nd Gen Scarlett 6i6 for audio interface to my Alienware Alpha PC running Windoze 10.