He seems to really be overcomplicating its construction with all those fancy 21st century electronics when in reality you can build it with early 20th century materials.
I wonder if a camera obscura would be enough to create the focused image instead of having to bother with lenses.
Probably, but that would require even more light.
Set appropriate expectations before you watch this video, it was definitely educative and entertaining, but the emphasis is on 'tried'. I was a little disappointed that it didn't actually end up working.