Rickrolling, in case you haven’t been online between early 2008 and now, is the practice of tricking someone into opening the aforementioned video, and it’s considered to be one of the most popular Internet memes of all time.
Below is the official statement from YouTube:
“With 20 hours of video uploaded every minute to YouTube, we count on our community members to know our Community Guidelines and to flag content they believe violates them. We review all flagged content quickly, and if we find that a video does violate the guidelines, we remove it, on average in under an hour. We also have a team that is dedicated to identifying and removing spam from YouTube. Occasionally, an account flagged by users or identified by our spam team is mistakenly taken down. When this is brought to our attention, we move quickly to take appropriate action, including restoring videos that had been mistakenly removed and channels that have been mistakenly suspended.”