Resolved
This issue is now resolved.
Monitoring
Functionality is fully restored and we are monitoring to ensure the system continues to be operational.
Identified
We've identified imports are failing due to a regression in the third-party library that supports youtube imports, and are testing potential fixes to resolve the issue. We will update as soon as a fix is in place.
Investigating
We have detected a problem with downloading from Youtube and are investigating the underlying issue. In the meantime, the suggested workaround would be to manually upload the video file.