Errors were identified on a nigh-negligible number of videos (less than 0.1%), and were only down for a couple of hours over the course of yesterday afternoon. We thank you for your patience. No further issues anticipated.
Hope you are all keeping well and ready for the new academic year.
Some of you may be experiencing an issue whereby a small portion of content is unable to load, and is showing a HTTP 503 error. We are aware of this and are actively documenting exactly where this is appearing, as well as triaging this with our cloud services provider. We are working hard to restore this small percentage of content, and will update you the moment we have progress.