Conversation so far:
What is Fallon's online presence?
The incorporation of the Internet was an innovation decided long before the show began. Highlighting interactivity, Fallon dove into the Web prior to the show premiering.
Did Jimmy Fallon get a lot of followers for Late Night with Jimmy Fallon?
Online interaction and its presence on the show were crucial to its success.

Question: What video was the most popular?
Self-contained rewrite: What video was the most popular from Late Night with Jimmy Fallon?