Great for stabilizers with a little boost.I think you could learn from his ideas and maybe do something with one of these.
If Bafang or other big ebike motor kit people see that stuff, they will be making systems just like that before he knows it. There are huge cost savings in those videos. The fabulous batteries and really thin wires for start, and who knew you don't need fancy connectors, and that all you need to do is wind some thin wires together? It reminds me of that African helicopter idea I once saw.