If you UPDATE Windows 11 to the latest version, you should be able to install and run Android apps. We are planning to check this out.

I think it is legal to put the downloaded video in your Google Drive and upload it to your NAS or set it up so that only you can watch it, rather than uploading it to Youtube or other sites unnecessarily.

It is legal to upload the downloaded video to your NAS or put it on your Google Drive and set it up so that only you can view it.