No thumbnails with youtube

The editor of the theme helps me .
Thanks.
So this post is end.

Hello

i installed videotube some months ago, all was fine, i had been away from working on the site for a while and got back to it today, only to find that none of the video or them changes i made show up, the site shows up, just basic videotube banner and not much else. update the theme and the plugins, no change.

my site is https://www.mgtowmentorvideos.com

I know i am missing something, but do not know what, any help would be most appreciated.