Starting at 10am ET on Friday, October 18, 2019, some uncached videos that were fetched over insecure connections ("http", or non-TLS) failed to play. We traced this to a change in our video delivery system and deployed a fix for it at approximately 9:30pm ET on Tuesday, October 22, 2019.
Videos fetched over a secure connection were not affected.
We are currently purging affected videos from our CDN cache and will update this message when that work has completed.
UPDATE (10/23 12:49pm ET): We have purged all affected videos from our CDN cache.