[rolph]

at some point the video is decrypted and exists on your machine, in memory. if you raid the cache after you force buffering bcz 4K and narrow bandwidth then you cant help but make a copy to your hard drive or other such non volatile.

here is one such approach:

https://www.wikihow.com/Save-Streaming-Video

here is my search string just as a knee jerk, but a deliberately crafted string will pop some real gems.

https://html.duckduckgo.com/html?q=save%20video%20from%20buf...

enjoy the safari and have pride in any subsequent craftsmanship that comes from it.

[noisem4ker]

Wait until they require Widevine or some other DRM crap. Then, with the help of your CPU's Trusted Execution Environment, the video will only be decrypted in memory locations you're prevented from accessing.