One mad lad is trying to play Hollow Knight and Silksong at the same time with one controller

There are challenge runs, and then there's "I'm playing Sekiro by hitting the Rock Band drums with my feet" -style absurdity. HandowShandowed on YouTube is indulging in the latter, with multiple video uploads showing them playing Hollow Knight and Silksong at the same time, synced to one controller...
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