I found lectures on DP by University of Virginia Prof Abhi Shelat to have best explanation of DP

https://www.youtube.com/playlist?list=PL5ro5yPzj5qDlSYHx9Luz...

http://www.cs.virginia.edu/~shelat/16s-4102/

If you need to understand specific DP problems that are common in competitive programming and interviews, then you should check out Tushar's channel at Youtube

https://www.youtube.com/playlist?list=PLrmLmBdmIlpsHaNTPP_jH...