Viral Video Chart: Barack Obama sings, Doctor Who's Matt Smith thanks fans

Watch the president cover Daft Punk's Get Lucky and the actor pen a farewell note in our rundown of the top online clips

There's been no shortage of cover versions of Daft Punk's Get Lucky, from this charming Tunisian version to Black Simon & Garfunkel's folky outing, so it's no surprise that the US president has got in on the act. YouTube channel Baracksdubs has mashed up a selection of the president's speeches to great effect– it's especially good how his hand movements are cut to the beat. Who knows, it might be enough to get George Osborne to forgive Obama for repeatedly getting his name wrong at the G8 summit.

Doctor Who fans were left grieving by the sudden news that Matt Smith is leaving the show at the end of this year. He released an official statement at the start of June, but this week the star paid a more personal tribute to the show's cast, crew and fans. Owing more than a little to the video for Bob Dylan's Subterranean Homesick Blues, it was recorded in Detroit, where he's shooting the film How to Catch a Monster with Ryan Gosling. Watch out for the handwritten notes where he thanks writer Steven Moffat – "the pen" – and Karen Gillan – "the crazy ginger one".

Finally, a couple of animal clips manage to burrow their way into the chart this week. First up is an ad for Ibis hotel featuring 40 rabbits snuggling up with a soundtrack by Richard Hawley. Impossibly cuddly, it's already been voted cutest ad of the year by Adweek magazine. Finally, we have a video of a dog trying to cool off by squeezing all four legs into a tiny bucket. It's all very well, but it makes you wonder – why don't his owners just turn on the hose?

Guardian Viral Video Chart. Compiled by Unruly Media and tweaked by Dugald

1. Barack Obama Singing Get Lucky by Daft Punk (ft. Pharrell)
Better than the POTUS's version of Let's Stay Together?

2.No, I'm not going to the world cup
Brazilians kick off in protest video

9.ibis Snuggling Bunnies
OK, it's an ad – but the bunnies give cats a run for their money