No, Gil Fulbright is not a real candidate for U.S. Senate. But he has some real insights about how campaigns work.
Fulbright is a creation of Represent.us, an organization that wants to overhaul campaign finance laws to curtail corruption in politics. Fulbright apparently plans to crash campaign events, run ads and do other things to attract attention to the group's cause in the very expensive Kentucky Senate race between Senate Minority Leader Mitch McConnell (R) and Secretary of State Alison Lundergan Grimes (D).
Here's another video explaining the strategy: