Probably the best choice if OP is dreading 11. Put it off, hope that in 3 years Linux support has matured even more for their use cases.

MS support has used this software themselves in an edge case where they couldn’t get Windows to active properly.

You have two options here:

1. Enable the extended support (no pay needed with this software but if OP absolutely refuses to run it they can pay Microsoft money directly though it takes work to find where to do that at) and run on that for 3 years until 2028.

2. Upgrade to LTSC IOT using the method they outline at the link there. Again they have two options, one is free, the other is following that guide but paying for a gray-market key (G2a for instance) for LTSC IOT which would avoid running this software on their PC but would mean paying someone some money for a corporate volume key they’re not technically allowed to sell. Which means support until 2032.

No.

This is where you provide a streaming link file like m3u8 or a link to such a file and watch streaming content provided by others. For example NASA has a channel like that, so does CNN, and various other ad-supported TV network streams. There are also paid providers that require a subscription for example to access content.