Did you read the link I posted?
Your USE of the word was insulting and derogatory.
When they were originally introduced, the terms “mental retardation” or “mentally retarded” were medical terms with a specifically clinical connotation; however, the pejorative forms, “retard” and “retarded” have been used widely in today’s society to degrade and insult people with intellectual disabilities.
Additionally, when “retard” and “retarded” are used as synonyms for “dumb” or “stupid” by people without disabilities, it only reinforces painful stereotypes of people with intellectual disabilities being less valued members of humanity.
There are other ways to describe what you don't like aobut the video.
"Two drifters off to see the world. There's such a lot of world to see. . ."