I'm developing an iOS app which is able to download m3u8 videos and play it offline according to the
iOS 10 latest feature Offline HLS.I'm trying to protect as best as I can
HTTP Live Stream format videos on our CDN.Each video has multiple bitrates so the
HLS files consist of a master m3u8 manifest which points to several sub manifest files which in turn point to ts files (transport stream).So I need to append this CDN token to the URLs of master m3u8, sub manifest m3u8 and
.tsfiles. And the token needs to refresh each minute.How to achieve this?