Vimeo unlisted video embed not working

Hello,
we have a problem with unlisted Vimeo links.
While Vimeo videos with the setting “Hide from Vimeo” and embeddable “everywhere” work, (e.g. https://vimeo.com/759953668) it does not work for Vimeo videos set to “unlisted” and embeddable “anywhere” (e.g. https://vimeo.com/759954642/d5ed598395).
It will only show “Ooops! The embed code for this video is not valid.”

The standard embeds work.
You can see the gallery and standard embeds here:
https://www.tracksandfields.com/blog/test-video-gallery/

Any ideas how the “hide from Vimeo” videos can also be embedded in the gallery ?

Thanks!