Currently using OneDrive new sync client.
Symbolic link to BI "NEW" Directory.
Recording on motion, large video clips take bit longer to upload.
Largest clip I have synced is 1.85GB. (Video Clips split at 1 hour or 1.9 GB)
SharePoint's max file size is 2 GB.
My upload link is 30 Mbps.
This is what my traffic looks like: