Andy, I’ve read as many endurance bfr studies as I could find. As far as I can tell, bfr is still experimental for endurance sports.
The youtube cycling coach in the video above seems to use BFR as a replacement for volume. With short bouts of BFR he says he’s stimulating mitochondria and building capillaries. He’s very into high frequency training for amateurs that don’t have time for long rides like elites. He actually has three videos on BFR but he’s not giving away any protocols yet.
The most interesting study is the Korean basketball player study. They did 5x3 minute walking intervals. Yes, just walking. They got an 11% increase in VO2max and a 2.5% increase in anaerobic capacity.
The Scientific Triathlon podcast with Richard Ferguson will give you some ideas. He mentions his colleague that went to work for Sky/Ineos. Anecdotally, I saw Geraint Thomas doing BFR intervals in a video. He was doing all out max 1 minute intervals.