I need some site names that provide research oriented mathematics video lectures for free.I came across some but even on my broad band connection they do not play videos smoothly.If anyone can tell me sites like you tube that plays videos very smoothly then it will be a great accomplishment.
I am not sure if this is something more to do with your connection than anything.
I would recommend looking at the universities listed here http://en.wikipedia.org/wiki/OpenCourseWare (there are many and maybe some have the sort of materials and quality you are looking for).
There are potentially others things such as: http://archive.org/details/msri
Maybe if we had a better idea of which topics you have interest in, we could provide more guidance.
There are a lot of video links here