If that still redirects you to a local version for some reason, append &gws_rd=cr (which AFAIK tells Google Web Server that a country redirect already happened and that no further country redirect should be triggered).
Youtube needs uppercase region and usually disrespects language if you don't append &persist_hl=1 (e.g. https://www.youtube.com/?hl=en&gl=US&persist_hl=1). Might as well append &persist_gl=1 too.
Not really an issue if you use bookmarks on your own devices, but super annoying otherwise.