Upload to Youtube problems using proxies

I shot a video on Blackmagic camera app for A Roll content 4k 24fps shutter 180 degrees iso 80
B Roll shot on phone camera 4k 30fps ( I hadn't realized it wasn't set to 24fps)
16 gb Ram for post production.
I generated proxies in DR 19 (free)
Timeline resolution 3840 x 2160 HD Final sequence 9 min 45 sec in duration . No motion graphics or affects apart from 2 titles.
Render worked fine albeit a little slow probable due to my laptop processor.
When I tried to deliver to YouTube using 2160p settings upload failed
So I changed timeline resolution 1920x1080 and YouTube upload settings to 1080p and upload still failed.
I then unchecked 'use proxy media' in YouTube advanced settings and upload worked fine.
Its my first time generating proxies and timeline workflow was just fine.
My understanding was that at delivery stage in DR proxies would revert back to their original resolution thus enabling high resolution uploads.

Any help would be much appreciated. Thank you.

Are you using the direct upload inside resolve? Don't.

This feature is never going to be stable as at any time Google could change their API and you are waiting on BM to update resolve.

Export a 60 mbit h.265 file from resolve and upload that via the YT website.


YT will accept Prores 422 or DNxHR HQX uploads as well, so you could select that from resolve to get faster renders. But you need to have a good internet connection to upload a 700mbit file in sensible time.

Thanks very much for your help. I will do that