Answer for Third Party Video Tags

QUESTION 1: I have not worked with these yet. However I may have found an example for you here http://mediaelementjs.com/tests/mep-vast.html 
 
Question 2: If you are on a linux server make sure that the javascript codes are all lowercase. Also with DFP there are 2 sets of codes required. One in the head tag as well as the actual placement of the code which can generate this error. Here is a video to help https://youtu.be/TrnjaGd3ASo