I am pretty new at trying to get credits and have been using a Samsung tablet. I just keep clicking "Yes" to play another video. It seems to take 8 or 10 taps sometimes, but usually they start.
It seems to help to go back to menu and click ' earn free credits" also. I am still trying different things but have had some success with just playing around with different methods. It's fun to get paid for wasting time for a change. Lmao. Good luck.
I will delete the "ledger" later...... It was just for an example of what can be done with stubborn and patient ways. ;)
Edit: A friend told me about a program to load into a PC to play videos and it works really well Emulator(Bluestacks). I scored 2014 credits with playing videos on Samsung tablet and PC together in just 1 day. !