I tried iexplorer, chrome and edge ... same problem with all.
the video was waiting for approval, it's available now (first 3 sec = screenshot while refresh, last 3 sec = screenshot with missing 'Photos' selction)
I was able to view the video.
Edit C:\Program Files\Xerox\FreeFlow Core\Tenants\00000000-0000-0000-0000-000000000000\Web (config file)
<add key="jobMgrPollingInterval" value="30" />
Unfortunatly, you cannot disable the refreshing time. As david said, edit the key to set the value to something like 86400 . ( so it will refresh once a day or as you wish) . If there is no key , then by default it takes the value as 30 sec. So you will have to add the key , if its not present and set the value accordingly so that it acts like its disabled.