I've migrated all videos over to YouTube: https://www.youtube.com/watch?v=Q-JquK0ERqA
In this 12-minute video, I describe what a Ph.D. in a STEM (Science, Technology, Engineering, Math) field involves, and present three practical reasons to pursue and not to pursue a Ph.D.
To learn more, visit: http://pgbovine.net/phd.htm
Also, Professor Ross Tate @ Cornell gave a good talk clarifying some misconceptions about STEM Ph.D. programs in the U.S.: https://www.youtube.com/watch?v=HkmlqeeBbZ0
(The version of this talk that I deliver in person is a bit more nuanced, covering various caveats in more detail.)