Hulu prevents Chrome's picture-in-picture (PiP) feature. This extension re-enables w/ play/pause, forward/backward seek, next episode, and restart episode controls. There is no previous episode button on Hulu. Captions will not display w/in PiP.
https://chrome.google.com/webstore/detail/better-hulu-pip/feeolchckomhbfagmgomdkncibjpedhh