DTM is a tool that allows you to do things faster. We can track HTML5 videos using event based rules in DTM. However it doesn't have any out of the box functionality to track videos provided by other video providers (Brightcove, Youtube, Vimeo, VideoJS, Flowplayer, etc.)
Please see the following steps for tracking the "YouTube Video" through Media Module Implementation.
Step 1: YouTube videos can be embeded in a webpage either through an iframe or an object tag.
Object Embed: Embed the video with with the API turned on e.g. http://www.youtube.com/v/8pB5sRsX5OU?fs=1&rel=0&enablejsapi=1&playerapiid=myytplayer on your webpage.
Note - Please make sure you don't have two tags with the same ID, but make sure the tag has an ID that matches the playerapiid parameter