Youtube embedded video produces error "ytcfg is not defined"

Question

The following erro message appears in the browser console if there is embedding youtube video on the page:

Note: no API was used for embedding, e.g. Youtube iFrame API - just a raw iframe.

It is also reproducible on the youtube website if you go to some video, click the Share button and choose the Embed tab. Or just open some video link in a new browser window, like https://www.youtube.com/embed/.....

Is there something I can do about this error message?

Answer 1

Its broken on their own site too

https://developers.google.com/youtube/youtube_player_demo