YouTube Mathematics Channels

MathscastsMathscasts is a maths revision website made to help you prepare for your maths exams. It has lots of videos for KS3, GCSE and A level. All videos have practice questions to try.

NumberphileVideos about numbers  it's that simple.
Videos by Brady Haran 
Statistics Learning CenterClear, short, entertaining videos, learn the basics of statistics from an expert teacher.

YayMathYayMath.org is the first site ever to have math videos filmed in a LIVE classroom.
Numberphile

NumberphileVideos about numbers & stuff.
Singing Banana
Videos

Maths DoctorMore than 250 interactive online video tutorials and accompanying worksheets.
An overview of the different ways to use Khan Academy
Mathematics in Movies

Mathematics in MoviesThis is a collection of movie clips in which Mathematics appears.
By Oliver Knill, Department of Mathematics, Harvard University.
Top 10 Maths Movies
Khan Academy

Khan Academy Maths LessonsVideos on YouTube which have been recorded by Salman Khan.
shmoop
Wow Math

Wow MathVideos covering topics in Algebra and Calculus.
Extra Resources
Benoit Mandelbrot: Fractals and the art of roughness
At TED2010, mathematics legend Benoit Mandelbrot develops a theme he first discussed at TED in 1984  the extreme complexity of roughness and the way that fractal math can find order within patterns that seem unknowably complicated.
The last banana: A thought experiment in probability
Imagine a game of dice: if the biggest number rolled is one, two, three, or four, player 1 wins. If the biggest number rolled is five or six, player 2 wins. Who has the best probability of winning the game? Leonardo Barichello explains how probability holds the answer to this seemingly counterintuitive puzzle.
Daniel Tammet: Different ways of knowing
How Maths Illuminates Our Lives  Daniel Tammet