I'd definitely take a look at DIT or Kaplan High Yield. I've been through the HY videos about three times and feel pretty comfortable with it now. This is coming from someone who nearly failed his first year Metabolism course.
A lot of biochem is just drawing out the pathways yourself and making sure you understand how they interact. I'd try and do this before watching any videos. You DO NOT need to know every enzyme and intermediate. This is a waste of time to memorize. You do need to know the major rate-limiting enzymes, the regulators, and important points in each pathway (i.e. a lot of things feed into pyruvate...know all of them, how they got there, what things regulate them, where it goes after that, etc. In other words, don't feel the need to memorize each step of the ETC and how many electrons each step is shuffling.
Overall though, Biochem tends to focus on diseases. So, make sure you know those, the typical presentations, lab values that might relate, enzyme deficiencies and potential treatments. If you know the overall pathway and important steps well this should be pretty easy.
It's funny, but Biochem/Micro were my worst areas starting off and now are probably my best. It's usually just simple recall questions once you figure out what's going on. One of the more High Yield ways to improve your Step 1 score.