Context: YouTube Play Buttons, a part of the YouTube Creator Rewards, are a recognition by YouTube of its most popular channels.\n\nQuestion: when do you get a play button from youtube?
Stream of thoughts:
a recognition by YouTube of its most popular channels
The relevant sentence in the passage is: YouTube Play Buttons, a part of the YouTube Creator Rewards, are a recognition by YouTube of its most popular channels.

.

So, the answer is a recognition by YouTube of its most popular channels