Why it worked
The video uses a popular meme format (Mona Lisa drinking) and applies it to a fast-food context, creating a humorous and unexpected visual. The quick changes and relatable scenario likely contributed to its shareability.
Summary
A man places a tray with a burger and drink on a table in front of a framed picture. The picture changes from a woman to the Mona Lisa, which then appears to drink from the cup with a straw. The picture then changes back to the woman, and the man places a whole roasted chicken on the tray, looking surprised.