That’s right, Google researcher Sanketh Shetty says that the “key to the formula is how people express their mirth: ‘We noticed that viewers emphasize their reaction to funny videos in several ways: e.g. capitalization (LOL), elongation (loooooool), repetition (lolololol), exclamation (lolllll!!!!!), and combinations thereof.'” Continue reading to watch YouTube’s most popular video.

Comments posted for No No No No Cat certainly reflected this, with kayleighzoe1 writing ‘lololololollololololol’ and muretto89 saying ‘XD LOL XD’.Google also took other factors into account such as how videos were described by the uploader and tagged and whether audible laughter can be heard in the background.

[via DailyMail]