Not sure why it wouldn't be allowed. I've watched the video and it's pretty much a rehash of the discussions in this thread with less detail. Their conclusion that it's possible because some secret tech new motor might exist that people are using is extremely flimsy and this has been discussed here too. The markets for improved motors are much bigger elsewhere, so the chances of there being something secret in the bike world are tiny. If you could invent it you'd get much more money elsewhere. Also, if there were decent tech to reduce the size and weight of these systems, they'd already be in consumer bikes. E-bike sales growth is enormous and a step change in technology would be worth a fortune compared to the pennies a pro cyclist could pay.
Well, consumer bikes bikes want to have 150W all the times to appease the ultra lazy delivery boys, and for grannies to make it up decent hills.
A race bike with just 20W would make a nice difference. A 2170 cell can take about 20 kWh. So a whole hour that 20W.
If you consistently do Galibier in similar times, you're gonne set a good PB with that 20W extra. Battery is 70 grams.
I don't know much about motors but for 20W at 110 rpm, torque might be doable. And for a race bike, you can get into silver wire or magnetic wire, whatever helps, price doesn't matter much, only stealthiness at an output that makes a difference.
Of course I'd make it such that that motor would only engage when there is more torque applied than I could maintain for 3 hours. So, it only helps when I'm hurting myself. No hidden switches, just 20W when I need it most.
Now if 50W were doable, that's a friggin moped. That 70 gram cell could do that, for 20 minutes and change.
Oh, the algorithms I'd come up with the produce the ideal power output through a race. Different per stage. No need for uniform power output either. It could be +10% when over 300W for instance, with a max of whatever the system could deliver. You don't pedal 700W because you had an itch. You need the 70W if you can get them. 300W means that the hours hiding in the pack are over.