The head won't come into focus, but it damn sure looks like a venomous pit viper (cotton mouth, water moccasin, rattlesnake, etc) to me based on the head shape.
Are people being sarcastic by saying this looks like a harmless non-venomous snake? It looks very much like a venomous snake to me.
I can't get it to play again on my phone for some reason. I think Google has intentionally sabotaged the YouTube site for mobile devices to force me to use the app, which I do not want to install.