Accessing "Electronic Press Kits" (EPKs) and localized audio tracks.

Sending master files back to the network after editing and color grading.

Standard FTP uses Port 21, but SFTP typically uses Port 22 .

Are you trying to connect to a specific Discovery asset server for work, or

The "cdn1discovery" naming convention suggests a node or an origin server owned by Discovery (now part of Warner Bros. Discovery). CDNs are used to distribute heavy media files—like 4K video, promotional assets, and high-resolution images—to various geographic locations to reduce latency.

Production houses uploading raw footage or finished episodes.

Partners downloading marketing materials, trailers, and posters.