According to the description of the video, the rider’s motivation for giving that man a lift to the bus stop was the fact that it was over 110 degrees Fahrenheit (43 Celsius) in Arizona on that day, and had the man missed the bus, he would have had to wait for the next one in the scorching heat.
The rider must have assumed the guy wouldn’t make it in time, having just passed a city bus heading towards the stop, and seeing him running more than an intersection away from where he needed to get.
Moreover, this was the first time this rider let anybody climb on his bike.
It goes without saying that this was extremely kind of him – after all, he could have just minded his own business and no one could blame him for it. Goes to show that behaving like an idiot while driving is inexcusable, although we have to admit that, in videos as in real life, we encounter much, much more of the latter.