The following fails with "Video Unavailable" even though the API shows embeddable: true with no region restrictions.
<iframe width="560" height="315" src="https://www.youtube.com/embed/M8BlP-nt7kE" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
Any ideas?
Best,Andy