The dog, we know from Amazon, is called Flash.
All around Flash, other dogs are doing dog fun things. Canines with four working legs are running circles around Flash while Jessie looks back in distress unsure of how to help his Maltese doggie.
Then a flash of an idea and because this is a commercial for Amazon. Jessie decides to go on his phone and solve the problem by running the Amazon Prime app.
He clicks a few buttons and the final scene shows the results of what Jessie was able to do by belonging to Amazon Prime.
He was able to order a baby carrier for his doggie and Flash got a new mode of transport around.
The song, as it turns out, is “I was born under a wandering star” by Lee Marvin
Watch and it’s okay to cry a bit.