[KSV]

I have checked your provided fragments and key file today. A 32 byte keyfile is supposed to be combination of 16 bytes aes key and 16 bytes for iv but that didn't worked out for decryption. I also tried to inject fragments and key into their official android app but the player was unable to decode the fragments with given key. I looked further into the app and found out that two separate players are being used for playback of free and paid streams. unfortunately I don't have any paid video to test the paid player although it seems quite possible to fish out the decryption key.