Problem embedding videos into rise 360 course

Hello,

I am trying to embed videos from one of our suppliers websites into a rise 360 course. The supplier offers the following embed code which I copy into the code field for the multimedia embed block.

<iframe width="560" height="315" src="https://tools.ovid.com/ovidgo/videos/embedded2.php?video_id=287" frameborder="0" allowfullscreen></iframe>

I have no problems seeing the videos - I have published to review and also done a quick share to create a link. I am working from home.

However, my colleagues working on the office network are having issues - sometimes. For example the video won't load, gives a blank or black screen, gives an error saying the video doesn't exist.

My feeling is something on the network causing an issue? Any ideas as to what could be the problem? We've tested with different browsers - edge & chrome.