Q 01/05
A) Me at the zoo
B) Hello world
C) First test upload
D) My trip to San Diego
Answer · why
The 19-second clip shows co-founder Jawed Karim in front of the elephants at San Diego Zoo, noting that they have really long trunks.
Q 02/05
A) Google
B) eBay
C) PayPal
D) Yahoo
Answer · why
Chad Hurley, Steve Chen and Jawed Karim registered the site on Valentine's Day 2005.
Q 03/05
A) $1.65B
B) $650M
C) $3.2B
D) $8B
Answer · why
It was paid in stock, and YouTube is now the second-most-visited website on Earth behind Google itself.
Q 04/05
A) Most-liked comment
B) Longest comment
C) Most-replied comment
D) First verified comment
Answer · why
The zoo wrote that it was honoured the first-ever YouTube video was filmed there, and picked up around 4.5 million likes for it.
Q 05/05
A) Baby by Justin Bieber
B) Gangnam Style by Psy
C) Charlie Bit My Finger
D) Despacito
Answer · why
It later blew past the 32-bit view counter's limit of 2,147,483,647, forcing YouTube to upgrade its maths.
Play the full YouTubers quiz — scored, streaked, and passable to a friend.