If you have a HLS stream, you can re-stream it using HTTP PULL.
Create a HTTP PULL resource, and enter the HLS url (excluded path and filename) as origin. In "Advanced Details" tab activate "Enable HLS/DASH Optimization" option.
The enablement of this feature will result with the following:
(1) Cache in the edge server RAM rather than Hard Disk
(2) An automatic cache expiry rule with 10 seconds for video content.
(3) The resource will have 30 second DNS TTL