@TeamYouTube
Hey, we see strange problems with the Data API over our PHP WebAPP since 10:15 UTC+1 today.
Private existing videos can't be found (404) over their ID (with login and content owner) - if we change them to "unlisted" they can be found & calls over Data API work normal
Hi there, that's strange. Can you get in touch with our Creator Support team who can look into this further: https://goo.gl/BxLi8H ? Hope this gets resolved.