Kanye West's "All of the Lights" video caused a stir this week when the group Epilepsy Action raised concerns about the quick, flashing lights in the video.

"Ofcom [a U.K. communications regulator] regulations mean that this video should not be broadcast on U.K. television," said the group in a statement. "However, the Kanye West video is still available online, most notably on YouTube where it has had several million hits, and no such regulations exist for online broadcasting. Epilepsy Action has contacted Kanye West's agent, YouTube and other online sources of the video to ask that they take it down."

As a result, the video was taken down from YouTube and other outlets for much of Thursday, February 24. It is now back up but bears a message in the opening seconds: "Warning: This video has been identified by Epilepsy Action to potentially trigger seizures for people with photosensitive epilepsy. Viewer discretion is advised," it reads.

The organization is happy with the change. "We are pleased to see that YouTube and Kanye West's representatives have listened to our concerns and are warning people that the video is a risk to some people," Epilepsy Action campaigns manager Aimee Gee said in a statement to MTV News on Friday. "We hope this means they will consider amending their policies so that other videos containing flashing imagery can also be dealt with."—Adam Fleischer