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.
They’d need dedicated hardware to enforce any kind of effective DRM. Encrypted bitstream generated on the fly watchable only on L2 attested device.
Which is why Windows 11 requires TPM.
DRM protection schemes usually don't rely on TPM, the real magic happens inside your GPU and the monitor.