Tip 1: I've found out quickly that not all instructors are created equally. Especially in math. I really feel for you if you're taking a difficult math class this semester taught by a stone face, monotone teacher that puts half the class asleep in 5 minutes. If you find you're having a hard time learning from your instructor you may need to go elsewhere.
On youtube there are plenty of helpful math videos; however there is one author that has set himself apart from the rest. You can find his site here, PatrickJMT
Trust me on this one. I've watched math videos from many authors on Youtube, many of them are just as bad as the professors that put you to sleep. Some have an accent so thick you can't understand them. Of all the video's I've seen PatrickJMT has the best, and is the easiest to understand.