I’m receiving the same error now on my Spotify embed iframes.
“Could not resolve the inserted value to a video. Are you sure it is a legal video url and the server can connect to its provider? If you tried to insert a raw embed code, you might need to enable it in the media settings.”
Sample embed code – <iframe src=”https://embed.spotify.com/?uri=spotify%3Auser%3Athemixcast%3Aplaylist%3A3QdUDzK74siKoOA7M99Zkp&theme=white” width=”300″ height=”380″ frameborder=”0″ allowtransparency=”true”></iframe>
Anything I should change or wait for a future update?