FreeDNS works pretty well as long as you don’t need more than 5 DNS records.
Have you tried mounting the google drive on your computer and copying the files with your file manager?
Transcoding from one lossy codec to another just reduces the quality even more. You can transcode to wave or flac, but that will just increase the file size.
There won’t be much of a quality difference between opus and mp4. If the music was uploaded at 44.1K, the mp4 will be higher quality even though the bitrate is slightly lower since the opus would be resampled to 48K.
I would suggest getting a router that runs OpenWRT or OPNsense. That will let you configure anything you need to. It’s open source firmware so it will respect your privacy.
If you go with OPNsense, you will need separate access points since it runs on a PC. The Unifi access points work well for that.
I always use yt-dlp do download youtube videos. It doesn’t require installation, you just download and run it.
I typically look for 1080p X265 encodes around 2-4 mbps to save disk space. I will download higher bitrates for anything with a lot of film grain since it will get very blocky at lower bitrates.
I can’t tell much difference between 1080p and 4K unless I’m very close to a large screen. Also, most 4K files are HDR and I don’t have anything that supports HDR.
Someone already worked out how to do it: IP over Avian Carriers. The ping time is terrible though.
Most devices generate a random IPv6 address and change it frequently. Your browser fingerprint is much more useful for device tracking than your IP address anyways.