If you use VLC or some other capable player it’ll automatically pick up the subtitles if they have the same name (sans extension).

Are you from the distant future? I have never heard anyone call Python 3.12 just Python 12.

No，the WWW is a part of the Internet. You can use something like Gemini but it is still part of the Internet and a lot of it will still be hosted on VPS and cloud providers.