Can't decrypt m3u8

[belindaschull]

Hello I'm trying to download this video

http://www.telemundo.com/novelas/2015/04/06/avenida-brasil-capitulo-1-rita-descubre-el-plan-de-carmina

there's f4m download option but is encrypted with akamai but atresdownloader found m3u8 link but when I tried to download with ffmpeg I got error and won't download same atresdownloader can't download the file but it's possible to download the m3u8 and choice the 1080i the aes .key and .ts segments but how to decrypted and how to download all ts segments instead doing manually?

https://telemundo-vh.akamaihd.net/i/MPX/video/NBCU_Telemundo/812/159/150406_2857352_Avenida_Brasil__Capitulo_1__Rita_descubre_el_,40,25,18,12,7,4,2,00.mp4.csmil/master.m3u8?__b__=1000&hdnea=st=1431041168~exp=1431041768~acl=/i/MPX/video/NBCU_Telemundo/812/159/150406_2857352_Avenida_Brasil__Capitulo_1__Rita_descubre_el_*~id=6015373a-bf0b-4be6-9482-6ff5333ed363~hmac=b0b0a6ee72f7ec164cae0b7b84fd9f69175a3f8ebd0ecefec23c5fdf5d3212a3