How to download videos from this site?

[lRyudo]

Hello everyone,

I'm trying to download from a web site called Cers, they have a free demonstration video wich can be found in this link https://www.cers.com.br/videos/demonstracao/3533.

The thing is, I bought a private class there, but I can only see each video 2 times, and I would like to be able to see 1 or 2 classes that I`ve doubts more times or its a subject that I find harder to learn, so it`s not for distribution or anything :/

I've been trying to download the videos with no luck, I'm using RTMPDumpHelper, but it won't even see the streaming... tryed using orbit with no luck, getfly, etc.

On the demonstration link, I did manage to find the stream link, wich gave me a file to download (although when I put it on the player it only gives me audio, and it seems to be streaming the audio not DLed it, since its only a few kb).
However, on the private section I`m not able to download even a small file, since I get the erro bellow:

Access Denied

You don't have permission to access "http://videos30-vh.akamaihd.net/z/2434_020314_CAMA_DEPU_AGEN_POLI_LEGIS_CUR_TEO_RESO _QUES_CESPE_UNB_CONH_ESPE_AULA_01_Pt_IV.mp4/manifest.f4m?" on this server.
Reference #18.82820781.1391469088.168b776

Any pros can give me some tips , really need this,

thanks in advance

*Edit: edit: I just saw that that website uses akami encryption... with Flash Video Downloader (on firefox) I saw that it keeps streaming dif. links, 0.3mb each... anyway to download all thouse and combine them? When I downloaded 1 it came with a .undetified format.