When I searched online for merry christmas graffiti, this mural was in all of the first 10 or 20 results: To see the video by itself, here's a YouTube link: https://youtu.be/J-QEFlIp9uk. There are more photos of the mural on the Graffiti & Street Art blog page titled Merry Xmas by Homer & Bart Simpson!.
I asked Graffiti Life (who painted the mural) where it's located along Brick Lane — so I could give you a tour of the art-lined street on Google Street View. They told me that it's been painted over. (It was painted in 2013, I think.)
Want to see other Christmas murals? Here's a Google Search for christmas street art.
I hope you're having — or had — a peaceful Christmas (and that Santa made it out of your house alive!).