This a video explaining the Toyota (Lexus) Hybrid Transaxle. While he doe not refer to the RX350H directly, he does speak of the RAV 4 and Highlander Hybrids, which I understand to be the similar (if not the same) to the RX350H. It is a bit wonky, but some of us might enjoy seeing the details of a the hybrid transaxle.

 

I love that video. Here is another that shows how it works in a simpler way.