The Bulldog in this video is looking behind the laptop for a friend he sees in a video. This is a very smart dog. He is watching a video on the laptop, and there’s a dog (possibly another Bulldog) who’s whining. This empathetic viewer looks behind the laptop for the source of the sound. When he saw nobody back there, he looks back on the screen. You can see the detective mind in him working. A dog with a strong intention.
Enjoy watching Sherlock Bulldog. I wish this video were longer.