You can optimize your CDN zones for optimal delivery of specific types of content.
Cross-origin resource sharing (CORS) is a mechanism that allows restricted resources on a web page to be requested from another domain outside the domain from which the first resource was served. This setting should be checked if you are delivering content that has the same-origin policy by default (web fonts, for example).
HLS optimization allows video on demand content that uses the HLS format to be protected by secure tokens. This setting should be activated only if secure tokens are enabled.
When HLS optimization is enabled your CDN zone will no longer satisfy byte range requests. Instead, it will respond with HTTP200 and will send the full file.