Ditto. Wish to change MS account and trying to backup files including uploading videos to Onedrive.
Steps to reproduce:
In Photos, long-press a video, select Share, Onedrive and target folder.
Blue toast status appears then disappears.
In Onedrive app the status at the top shows "uploading 1 of x". Progress bar reaches 100% then gets stuck there for the first file.
After this eventually the phone crashes, usually (but not always) when performing an action in the Onedrive app.
I queued up about 20 uploads before I realised they were taking forever to get uploaded.
Device: NL920
WP version: 8.10.12.12382.878
OneDrive version: assume latest 4.1.3 - not sure how to check version, app has no info
Network: wifi