amp-vimeo: Add support for unlisted videos

[westonruter]

Describe the new feature or change to an existing feature you'd like to see

Normal Vimeo URLs look like: https://vimeo.com/172355597

But Vimeo also has the ability to create unlisted videos: https://vimeo.com/blog/post/share-unlisted-videos-with-private-links/

Such unlisted video URLs look like: https://vimeo.com/172355597/abcdef0123

However, the amp-vimeo component has no way to supply the unlisted secret key. It only has a data-videoid attribute.

Additional context

This issue was discovered as part of the AMP plugin for WordPress: ampproject/amp-wp#2986

[westonruter]

/cc @alanorozco

[wassgha]

Hey @westonruter , do we have a private video we can use for testing this? (or a premium vimeo account?)

[westonruter]

I am not aware of one, unfortunately.

[wassgha]

Would it be safe to assume that the embed iframe will expect the same format (.../id/key) or would the iframe expect the key to be passed on as a parameter? I can't seem to find any documentation about embedding private videos on the Vimeo side (and I can't do trial and error since I don't have a private video on hand)

[westonruter]

I was also unable to find documentation on how to embed private videos.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

[westonruter]

This should still be done. We just need an example unlisted Vimeo video to test.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.