It may seem out of date but actually I would recommend using a book rather than a video tutorial. The videos are a 'how to do' and provide you with a step by step guide. But they do not tell you the principles and why. And it may cost. But a book allows you to read around a subject - then you can try it out.
Which is best is an impossible question to answer as it depends on your current knowledge. Most books allow you to read a bit before you buy so best for you is perhaps the one you feel most comfortable with.