How can I find videos of mathematics at graduate level, especially on linear algebraic groups I am studying mathematics by myself, and I find it very helpful to watch online course videos.

There are many such videos on undergraduate courses, such as elementary calculus, abstract algebra, general topology and so on. But, it is difficult for me to find videos at graduate level. I find this, but most of the courses provide only notes.

So, would you please share some links of videos of mathematical courses at graduate level? Or of videos that are enlightening to a mathematical student at this level? Especially on Linear Algebraic Groups, Algebraic Geometry and related topics.

Thanks for answering. Also, many thanks to the colleges and teachers providing these videos, which are really very precious for studying math.
Here is a link to about 40 hours of lectures given in 2007/08 by L. Goettsche on Algebraic Geometry as part of the Postgraduate Diploma program at the Abdus Salam International Centre for Theoretical Physics in Trieste, Italy.
There are many at DNAtube, such as: http://www.dnatube.com/video/6899/A-Par ... DE-Formula , and many others from this author. And more on YouTube, such as at: http://www.youtube.com/watch?v=4JFFLruvqP4 by the same author. But Algebraic Groups &amp; Geometry in particular not sure.