Error in Google Structured Data Testing Tool

Hi,

While running a few tests on the site using Google’s Structured Data Testing Tool (https://search.google.com/structured-data/testing-tool) I encountered an error regarding this plugin:

ERROR!
VideoObject
thumbnailUrl
“A value for the thumbnailUrl field is required.

My site is displaying all the thumbnail images with no issues, and this error is only showing on pages on the site where this plugin is been used.

<div id=”video_kgvid_0_div” class=”fitvidsignore kgvid_videodiv” data-id=”kgvid_0″ data-kgvid_video_vars=”{"id":"kgvid_0","attachment_id":0,"player_type":"Video.js","width":"100%","height":375,"fullwidth":"true","countable":false,"count_views":"start_complete","start":"","autoplay":"true","pauseothervideos":"true","set_volume":"1","mute":"false","meta":false,"endofvideooverlay":"","resize":"false","auto_res":"automatic","pixel_ratio":"true","right_click":false,"playback_rate":"false","nativecontrolsfortouch":"false","locale":"en","enable_resolutions_plugin":false}” itemprop=”video” itemscope itemtype=”https://schema.org/VideoObject”><meta itemprop=”embedUrl” content=”https://01897uiop.cloudfront.net/videofile.mp4&#8243; /><meta itemprop=”contentUrl” content=”https://01897uiop.cloudfront.net/videofile.mp4&#8243; /><meta itemprop=”name” content=”A video about koalas” /><meta itemprop=”description” content=”In 1967, koalas took over the world and a new empire was born” /><meta itemprop=”uploadDate” content=”2018-01-20T00:47:36+00:00″ />

Again, the site is operating with no issues but I am just making sure that I am running clean code on my end.

Thanks again for making this great plugin.