That depends on what video player you use. Of we have control of that, then sure it works. I use mpv to play things, so for radio streams or live videos I can go back/forward as long as it’s cached.

But if it’s the web service, even though the browser video player has something cached, the player is still controlled by the website. And considering most of the people use chrome/chromium derivatives or YouTube app, it wouldn’t be hard for them to make it so that the player itself will collaborate with whatever they want to do.

If YouTube was a separate organization it wouldn’t have been the problem it is because of how Google has been taking over all the different parts they need for advertising.

Miniserve is a program for computers. Though you can run it in termux. It just opens a tiny server instance for file sharing, you can download/upload files to a directory directory. Will also show QR for the link.

It is kinda like that. We have a tracker that we added because they increased the insurance rate and said if you install this device we’ll keep the rate low based on driving patterns.

Basically records how often you drive, hard break/sharp turns, after midnight drives, etc. We don’t drive the car often so the prob of accident is low but we recently learned that they can consider not driving enough also bad saying it can make you drive recklessly or sth.

Ever heard of open source?