The internal speakers cutting off while docked seems to be a bug; I had the same issue and was able to work around it by following this comment.
For music, I have FreeTube and Tidal installed as non-steam games. I’d prefer if I could hit the media control shortcuts on my keyboard and control Tidal while I’m in a game, for example, but I haven’t found a way to do that. The closest I’ve gotten is by installing Decky Loader and the Music Control plugin.
But when Youtube shares the key with me/my client the first time, is that also encrypted?
Here’s an explanation of what happens during the initial TLS handshake.
…if ISP automated the process of gathering keys and decrypting web traffic for a certain site with them for all users, would that work for them?
Not sure this is exactly what you’re asking, but there’s the concept of forward secrecy for defending recorded encrypted traffic from future key compromises.