In ten years time YouTube will be entirely inaccessible from the browser as the iPad kids generation are used to doomscrolling the tablet app and Google feels confident enough to cut off the aging demographic.
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We'll eventually be able to reverse-engineer that and run it programmatically, but it will take a long time.
And when they catch you doing so, they'll ban your (personalized) encryption key so you'll just have to buy another graphics card to get another key.
This is how it already works, not some future thing. But the licensing fees make it so it only gets used for Hollywood-level movies.