Error code 0x20200259)

Mosa Tleane - Sorry you are running into problems. 

Have you been able to play videos in the past? Do any videos play or do only newly uploaded videos have this issue? Can anyone else within your organization play videos?

I tested out upload and playback in a few test tenants and wasn't able to reproduce the problem. I also looked through any open alerts on the system and didn't see anything that seemed obviously related to playback issues. 

Could you file a support ticket and they can help you gather more info like fiddler traces and session IDs. If support can track down the issues they'll escalate it up to us in the product group for further investigation.