Nice video. This is a great visual way to get the point across to those who don't cycle and would never see the issue. Around here they usually paint arrows on the roadway indicating whether turns are permitted from a lane. Of course, paint wears pretty quickly and drivers usually mimic other drivers even if wrong. At critical points I have seen concrete curbing that separates the turn lane from the straight-ahead one. Of course, this would have to accommodate the left turning vehicles. I like the idea of the bike lane to the left of the right-turn lane. This seems to work well around here. I have no experience with the signal dependent design change you propose, but it does raise a few worries. Drivers in this area rarely obey "No RTOR" signs and even if permitted, they uniformly forget that there is a requirement to stop first.
Good luck - and thanks for sharing this.