Pretty sure something screwy was happening on YouTube’s end. Had a captcha and didn’t let me solve it (can’t recall the error code) ended up turning off my router for 30mins to get a new IP (compared both the old and new one) and added a VPN to my router for good measure and it seems to be working, not sure for how long though. Seems other people also had this happen so just wanted to post my findings here just in case anyone else is having this.
Edit: wasn’t on a VPN originally. I added one to my router after getting a new IP
Happened to me yesterday too, when I tried loading Tubular on my phone. Trying to go to the page to solve the captcha would give me an error code too, and later trying to load the YT page on my regular browser at the PC also gave me “you are offline” errors on every new page load, although a refresh would make it work (but not load stream chats or comments)
Today everything seems to be working again. I haven’t tried refreshing my subscribed channels in the app yet, given that I follow 750 of them, that’s probably what’s triggering this.