FeDeX_LaTeX
Science Advisor
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I agree, I think Khan Academy is the most appropriate here; PatrickJMT has some great stuff too, but doesn't start at as low a level as Khan Academy does. I think Dr Chris Tisdell's videos are great; he has one of the best YouTube series on Fourier series I've ever seen. Once you get to the calculus level, you should check out his videos (that may be in a years time, possibly a little more, depending on how fast you work).