Problems with Lightbox Not Working

Hi Guys

I am having a problem where the video embeds are no longer opening in a window but actually going directly to Youtube etc instead and away from our page

You can see an example here: https://mmanuts.com/podcast/ep-127-ufc-154-recap-gsp-vs-condit/

I am not sure what happened but this has been working for several years and all of a sudden it stopped.

If you could provide any input on how to fix this it would be much appreciated.