Mick Konstantin's tribute to UFC champion Conor McGregor ahead of his ill-fated fight with Floyd Mayweather was Ireland's most-watched video of 2017.
The masked performer was a contestant on Thailand's aptly named singing competition show "The Mask Singer". Facebook in May said it would hire 3,000 more people to review videos and posts, and, later, another 1,000 to review ads after discovering Russian ads meant to influence the US presidential election.
"Some bad actors are exploiting our openness to mislead, manipulate, harass or even harm", Wojcicki said, adding that YouTube's trust and safety teams have reviewed almost 2 million videos for violent extremist content over the past six months.
It's that time of the year when people begin looking back at the year gone by. Daddy YankeeEd Sheeran - Shape of You [Official Video] DJ Khaled ft.
- Seven minutes and 16 seconds of incredible table tennis trick shots.
The America's Got Talent judging panel was so impressed by Darci Lynne Farmer's ventriloquist routine that they sent her straight to the live shows by pressing the coveted Golden Buzzer.
As well as a musical tribute to the Crumlin fighter, there were also appearances from artists like Ed Sheeran, Christy Dignam and Finbar Furey, and Harry Styles, the latter having released his debut album earlier in 2017.
- Lady Gaga's Super Bowl LI halftime performance. Some 250 advertisers earlier this year also said they would boycott YouTube because of extremist videos that promoted hate and violence.
From the same channel that overdubbed scenes from movies like Twilight and Star Wars comes this comedic and fictitious lip reading of President Donald Trump's inauguration ceremony.
This mini-film about a boy who follows his heart is the first animated short to make the list since 2011. No surprise here: "Despacito" took the crown.
Despacito sits at the top of 2017's top music video list - not just as the most-viewed music video for year, but as the most viewed YouTube video of all time with 4.4 billion views. See the top 10 below.