Even if you install the chain as pictured in this video, your bike will still be perfectly rideable. BUT you will wonder "why is my new chain and cassette so damn noisy? Why is the shifting so finicky?", and you will take a video to post to BF and ask the mechanic forum "why is my new drivetrain so noisy and the shifting so finicky?", then you will look at the video again and go "ooooooooooooh. dammit."
https://youtu.be/UneF1LhPRtA