Depending on what part of the world you’re in, you might see this message:
“We're celebrating friendship on Facebook’s 12th birthday, so we made you this video about you and your friends.”
Or you may find this one:
“We’re celebrating friendship on Facebook’s 12th birthday. But we’re not quite ready – please check back later!”
Just Click this link which will take you to the Facebook App page for video creation:
Friends Day
If you are lucky and depending on your contents and location, you will be able to create, otherwise, you may find this message:
"Sorry! We don't have enough content to make a Friends Day video for you."