Not working

Hi when installed plugin and reloaded page with youtube video in it nothing happened.

When looking at html source code and comparing it to what plugin should add it appears that the code including the tag: <!– Responsive Video Embeds plugin by https://www.kevinleary.net –> does not appear in browser html source code.

Is there a solution to this?

url: https://www.newlov.co.uk/longitude-throwback-music-interviews/

https://www.ads-software.com/plugins/responsive-video-embeds/