The efficiency boost doesn't work on my end, watched three ads and the efficiency didn't increase.
I'm guessing it works like the Reset Activity boost, adds efficiency every hour. Unconfirmed.
I have just seen a tweet confirming it is +5%, like the reset activity. I am wondering whether video+reset gives +10% per hour
Aye, it's a potential net gain of 10% every hour, 8% with the hourly Efficiency decline. Put another way, the videos are cumulative with the hourly check-in.
And this is just the tiny first step of many more to come.