It is, of course, possible, but lacking further information, we can't know. What we can see is that an inordinately large number of cops descended on them. And what could they have shown? Cyclists don't usually carry receipts for their bicycles. The bikes could be 20 years old, hand-me-downs. Who the hell has paperwork for a bike?
I don't carry the receipt for my bike when I ride. I never did. Of course I'm an old white guy, so nobody is going to say I stole my bike. I could steal a bike a day and get away with it. If I did, I sure wouldn't steal crappy old Huffies like the ones in the video, though.
Of course it's possible they were just as bad as some people would like them to be, but it's also possible that in the situation they found themselves in they realized that they were outnumbered and outgunned, and that nothing they did could prevent the inevitable. If a cop with a gun says he's taking your bike, do you struggle for it, knowing that the next thing is that he'll draw his gun and kneel on your neck, or send you to jail for a handful of trumped-up charges?