[Plugin: Google XML Sitemap for Videos] Video site map generator does not pick up any of my videos

I have 7 videos displaying on one page: https://ericyoffie.com/videos-3. And, each video is treated as a separate post. For example, the Liberty University speech is at: https://ericyoffie.com/liberty-university-speech-video/. And there is a custom field, called YTvideo that shows the embed code from Google.

For example, for the Liberty University speech, it is: <iframe width=”960″ height=”720″ src=”https://youtube.com/embed/pn084Q3X_lE&#8221; frameborder=”0″ allowfullscreen></iframe>

When I run the Google XML Sitemap for Videos plugin, I get the following result.

“XML Video Sitemap
Generated by Creative Modules’s Video SEO plugin
This sitemap contains 0 URLs.”

In other words, None of my 7 videos are getting put into the site map. Any ideas?
Thank you.

https://www.ads-software.com/extend/plugins/xml-sitemaps-for-videos/