Can anyone tell me about the websites where I can find video lectures on different math subjects (especailly vector analysis and function theory ), Physics subjects and Electronic Engineering subjects and download them ?
The above one is a great place to start. Select topics from the menu to the left. Although not all courses have video lectures, it is still a great resource. I cannot provide you with anything more specific in engineering and physics as I do not know what level of these subject areas you are interested in.
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