Sorry, this week has been really busy with work and now the long weekend. I've only thought of this as I'm sitting down to edit another video.
Having brought all the clips into the media bin, I will select the four that I want to merge into a multi-cam footage. In the cut pane, I click on the sync icon in the top left and select to sync via timeline. This then creates a new multi-cam clip with a timecode starting at 01:00:00:00 instead of keeping the same timecode as the source clips.
Creating a timeline from multicam & green screen clip means I can't then sync the two using the timecode as they are now way out.

- Media Bin
- Media Bin.png (84.25 KiB) Viewed 320 times
Above is a screen shot of the media bin after I've created the multicam clip, as you can see it's timecode is completely different to all the other clips. Ideally, I'd like to put the multicam clip and the HDR90_C_Live... onto the same timeline, sync them via timecode, use the delta keyer to remove the green element of the green screen and just get to business of choosing the best angle for that particular moment of the video.