I have a working knowledge of calculus and have been able to understand the application of Newton-Raphson technique for unconstrained optimization. Please point me to some of the easy to understand tutorials for advanced techniques like BFGS and LBFGS. I prefer video lectures to books and books to papers.
My aim is to understand how these methods work and code some of them (python/scala/Theano) for better understanding. My area of interest is application of these techniques rather than proofs.
[this was originally posted in SO where I was suggested to post in this site]