Virtual Studio Backgrounds including Alpha Channels

Hi

We do a lot of virtual studio content creation and now need to find a simple way to have a video play through a screen on the virtual studio set ...

We have converted from Adobe where it was easy to Resolve and need to know how to get an Alpha Channel

The link below shows what we are trying to do, any help would be great

movietoolsbiz has a great tutorial which shows how it works in adobe premiere

Thanks, Mike

[Peter Chamberlain]

No link ??