Happily I didn’t shoot endless footage, so I shouldn’t get too bogged down sifting through endless shots trying to determine which is best.
Its been a while since I have done any keying but after a while I managed to get a usable result.
I really wanted my feet in the shot but I forgot that I was standing on grey floor (very close to my clothes colour) lots of keyframing masks.
The next technical issue was matching the window to the proxy board. This turned out to be much harder than I thought I actually need to match this in 3D space. I tied a few methods but ran into problems as the woint I wanted to match ended up out of frame.
I could have spent hours trying to accurately set up the whole 3D space but this shot was down to a few seconds so I did a basic tracker for x y movement then keyed the 3d movement.
Now most of my content is keyed and the window frame roughly matched. (I can tidy this all up later once I have the final cut), but it actually looks like it might work.