Conversation so far:
When did Paris Barclay start his music video career?
Following his graduation from Harvard, Paris Barclay worked as a copywriter and creative supervisor at Grey, BBDO, Cunningham & Walsh, and Marsteller. Barclay then moved into music video directing.
How well did Paris Barclay's music video career do initially?
Paris Barclay directed music videos for Bob Dylan, the New Kids On The Block, Janet Jackson and Luther Vandross.
Who else did Paris Barclay create videos for besides Bob Dylan, Luther Vandross?
Most notably, Paris Barclay created eight videos for LL Cool J.
Were all of Paris Barclay's music videos related to movies?

Question: Why did he take such a long break?
Self-contained rewrite: Why did Paris Barclay take such a long break from making music videos?