VPN plus watching on the specific channel apps. You’ll get kicked off YouTubeTV after a couple months until you login from your local area, but still have access via the direct apps/watch live pages in a browser.
If you want direct access to your YTTV account, you can also have a friend or family member login for you at home to reset YTTV. I believe Google also might have a special exemption for service members that you might look into (can’t remember if that is just for Fi or if it applies to the YTTV local area as well).