No one comes out looking like a saint here. Overall, as I understand it, these city bike programs are meant to encourage environmentally friendly commuting. Based on the interview with the teenage boy, low income residents get a reduced price for 45 minute rides (possibly for free? I wasn't sure I was interpreting the receipts correctly). As described, it sounds as if the logic behind the price increasing after 45 minutes, is that the bike program allows free users to have 45 minutes of "fun" riding and then they want to encourage you to relinquish the bike so it can be used for its intended purpose of commuting. It's not exactly "in the spirit of things" to repeatedly use the low cost E-bike privilege from 5 pm to 10 pm, for what amounts to joyriding, thus preventing someone from using it to commute, especially as rush hour is going to fall right in the middle of that. I can understand, however, if he and his friends were now a 45 minute bike ride from home, that it would not be palatable, at that point, to give up the E-bike and have to ride another one home manually. And, according to his story, although he and his friends were gaming the system by physically holding the bikes until they reset, to prevent other users accessing them, and doing so multiple times per day, they weren't doing anything technically illegal or (from what I can tell) against the terms and conditions of using the bike.
On the other hand, it's also not super nice to game the system using the new E-bikes on riding for fun when there's a pregnant woman (of any race) who would like to get home after work. The bike gives you 45 minutes at a low cost for leisure, why not be happy with that? Why circumvent the reset period that was clearly designed to encourage return of the bikes to general use, so that you can extend your leisure ride to the span of hours? And, just as the teens didn't really want to ride 45 minutes home on their own steam, I doubt the pregnant woman fresh off a 12 hour shift wanted to do so either. I'm not sure about the validity of considering yourself to have "reserved" an E-bike (that is, officially, not currently rented by anyone) by physically holding on to it for 20 minutes until it resets.
Her behavior doesn't look great either. If I were in her position and a group of teens were physically holding E-bikes that they had not, in fact, rented (just waiting for them to reset for rental), and preventing paying users from renting them, I would be pretty upset I think, but I would probably just walk away and take the subway or whatever. The details of her story and his story about how she got on the bike, are different, so I'm not sure how I would parse working out who was right or wrong there. In the video she was already on the bike, from what I could tell.
If I were the Bike rental company, I would probably change the reservation system so the same user could not rent the same bike twice in a row like that, even with the reset period. If you leave a gap in your system, people will game it, and ultimately you'll end up with a system that is not useful for commuting, which defeats the purpose.