AWS CloudFront :Privacy protection envelopes to the consecutive segments

In AWS CloudFront, at the origin server, the content is divided into media segments which are further distributed through edge locations. But there does not seem to be any details to indicate that the privacy protections envelopes/details were also injected from the content source along with the file segments. Since the origin server adds the privacy protection envelopes to the consecutive segments, can it be inferred that the origin server also injects the privacy protection envelope along with the consecutive file segments? Thank you so much for your quick and timely response.