Great question, with a simple answer! We display the local time that the player engaged with your game in the playtest video. 

We always approach every playtest result with the goal in mind to explain to you the entire picture of how a player engages with your game. That is why we have players talk aloud and record their touches, this way you can get an idea of how they perceive your game.
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We also allow you to see the date and time that the video was recorded so you can gain integral data on what times players interact with your game, at what point do they take a break, and for how long?