The lecture Amino Acids by Kevin Ahern, PhD is from the course Biochemistry: Basics. It contains the following chapters:
Couldn't ask for a clearer biochem video. Dr. Ahern is superb.
The lecturer did a great job in going into detail where a student could have easily become confused or uncertain; furthermore, the lecturer was able to guide and connect ideas together in a reasonable amount of time which is great for understanding the bigger picture.
Kevin is really good at explaining the concepts simply and effectively