This recommendation is for Best Dramatic Presentation, Short Form. It was posted to YouTube on December 27, so it just barely made eligibility for the Hugos this year.
The video is "Blink To The Future," and it's a mashup of Back To The Future
and Doctor Who
Just sit back, watch it, and prepare to giggle. As the creator said, "Somewhere in the jaw-dropping vastness of the multi-verse, I like to think that this cartoon plays at 7am every Saturday morning."