Right now I cannot watch it :..(. can't wait for the tutorial. I have made some greenscreening tests lately too, with more or less satisfying results. I bought some textil color for a big towel, but in the end it wasn't a proper green, more like a blue/green camoflage... So I had a lot of difficulties to mask it correctly. I have added a Turqoise Screening Mode in my blitz composting app, and this one is really good. It can mask even "difficult" shots easily. Tho the foreground colors are somewhat limited. The Red part of it must be at least equal the blue or green part. For people in black clothes it's perfect. Unlike many other chroma key apps it doesn't work on a yes/no base, but is capable of blending the contours of the forground. So the antialiased contour pixels will become partially transparent, depending on their amount of green. Unfortunalely the app is dead slow.
I already experienced you need a big room for good bluescreening, so you can light the towel from behind the actor, so there are no shadows on the towel.
I already experienced you need a big room for good bluescreening, so you can light the towel from behind the actor, so there are no shadows on the towel.