Youtube video doesn't show Failed to execute postMessage

Hello,

I try to embed a youtube video with video-background plugin

Failed to execute ‘postMessage’ on ‘DOMWindow’: The target origin provided (‘https://www.youtube.com’) does not match the recipient window’s origin (‘https://mysite.com’).
chrome-extension://enhhojjnijigcajfphajepfemndkmdlo/cast_sender.js Failed to load resource: net::ERR_FAILED

How would I fix this? Stackoverflow answers say that I should use https, but the site is already running on https.

https://wordpress.org/plugins/video-background/