Is Comet-cache supports HDD Cache for Video files under S2member-files?

Hi
We store our video files under s2member-files folder and outside of that secure folder and simply embed into our wordpress posts by [embed] codes.
We have recently used cachify and cache enabler but didn’t understand they are okay for video caching or not , so my question is does comet cache supports video files caching which are located under s2member-files secure folder?

Comet Cache, like all other WordPress caching plugins, is a page caching plugin. It caches the output from PHP that is generated by WordPress. It does not do any static file caching. That sort of caching needs to happen at the server level.

Comet Cache can help you enable server-side features that improve page speed, such as GZIP Compression and Leverage Browser Caching, but neither of those would apply to video files.

The best thing to do for video files is to host them on a CDN that supports streaming, like Amazon S3/CloudFront, which s2Member integrates with (see s2Member → Download Options → Amazon S3/CDN Storage Option).

Okay seems i have to also pay for amazon cdn.
However if somebody already has dedicated server then they don’t need also for the amazon storage option for videos.

Do you think only plugin which provides video file caching is cachify? Or do you know any other one?

Another problem on Comet Cache is while using Bulletproof security plugin the gzip option from the comet cache dont work.