Can you provide more information regarding what issue(s) you're experiencing? Most of these processes are standard and required for Windows to operate.
Also if you truly mean "written down" on paper or the computer, I would get a password manager and load all your credentials there, much safer. BitWarden starts out with a free plan or $1/month for a lot of extra features.
You will have to setup the key per site you wish to use it on. Most of the time it involves going into your per site security settings and adding the passkey there, entering your pin (setup on the passkey) if you set one up on the passkey and that's about it. All of the complexity is not...
I'm not sure how this differs from what you can already do. 1Pass and other password managers already have integrations that work for things like RDP and ssh key passthru. 🤷♂️
SMplayer jump is 10 seconds (and always jumps 10 seconds) or other options to jump to specific points. I've used SMPlayer for a long time, by far my favorite player
If it's Pro you can just run the following from an elevated powershell prompt
(Get-BitLockerVolume -MountPoint "C").KeyProtector | Out-File -FilePath "C:\BitLockerRecoveryKey.txt"
Can you double check that your yubikey supports discoverable passkeys?
Also do you use this key a lot? Yubikeys only support about 25 discoverable creds.
I might also suggest looking at event log. I don't recall the exact log name could be CTAP, WebAuthn or even filled under Windows Hello
Most service providers have an account recovery service, Microsoft included.
As a disaster recovery method I personally have two yubikeys with the same key material. One is kept in a fireproof safe. This works well for server-side passkeys, not so much for discoverable passkeys since they are...