There is a trick with bonus video. This is only via mobile app Rail Nation.
When you watch video, go untill it ends, of course. and then, dont close it for few seconds (around 3). then close it, bonus video window will open back in the app itself. dont right away click on next video. wait until line Reward will be payed out shortly dissapears and then after 2 secs, press it Watch video. then videos is gona play one after another and app is not gona crash.
it doesnt matter how fast internet you got, it will be dead if you press it right away. 4 videos max and app crashes or you gona watch videos without getting first or second reward.
not sure where is the problem, but might be in same devs department. where they cant fix chrome/firefox issues with videos. maybe someday in closest years future all videos will works as it was one year ago. cause of this i left the game for more than a year.
we will see how things go.