I have the same problem.
When I am in training, there is no button for the double bonus (sometimes).
But I have available video for free. When I go back to add condition to a player, there is a blue button for a free video.
Or when I 'm searching for free gree packs with videos, I can see 2-3.
But when I go back to training, still there isn't the button for X2 raining.
Not even for the first training of the day.
Why ?