Video sitemap is not working

[zumango]

Hi
This script is working like charm for creating sitemap.xml files. But it creates sitemap_video.xml with no data in it. Site is a video tube site at [ External links are visible to forum administrators only ]
Any suggestions.
Thanks

[XML-Sitemaps Support]

Hello,
Note that only videos from this sources can be detected by sitemap generator bot:
https://www.xml-sitemaps.com/video-sitemap.html
YouTube, Google Video, Vimeo, Dailymotion, MTV

(since they provide API that allow to get video details like play duration/thumbnail etc)