You may also be interested that the Git tip of the master branch of the GNU Hyperbole package has a nicely designed link interface for controlled playback of yo

You may also be interested that the Git tip of the master branch of the GNU Hyperbole package has a nicely designed link interface for controlled playback of youtube videos, allowing for easy link creation as well. See the hsys-youtube.el file. This will be part if the next package release as well. For example, it can play just a particular span of a video from a start and end time.