This PPA brings in the recent version 17.2.0-1 of smplayer for dCore-trusty, dCore-xenial, and dCore-yakkety. As well as latest version 17.1.0 of smtube for those dCore ports as well. Add this repo to import from with the below command:
This imports smtube and smplayer and some updated related libraries. Using it on dCore-trusty now to watch Youtube videos, very good performance with smplayer as opposed to using a web browser.