Trying to reverse a firmware

[deroad]

Hi.
i'm trying to reverse a firmware of this mp4 to mod it.


now, i found a firmware image (*.bin file) and his flasher.
i dumped the binary i saw that this bin is just a compressed archive, not a firmware image.
the problem is that i can't extract this binary! the header of this bin is

00000000  37 30 30 38 00 02 09 00  00 05 03 60 06 80 07 2d  |7008.......`...-|
00000010  0c ee 01 00 1d e2 85 00  00 00 00 00 00 00 00 00  |................|
00000020  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*

i have a list of almost all the files inside the firmware (you can read it from the offset 0019e500)
but i'm not able to unpack this bin..
if no one can help me, i'll try to write something to unzip this tomorrow.

this is the lsusb report (don't know if you need it, but the hardware seems generic ):

Bus 001 Device 004: ID 1234:5678  
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x1234 
  idProduct          0x5678 
  bcdDevice            0.01
  iManufacturer          16 GENERIC INC.
  iProduct               32 FUSB200
  iSerial                96 01234567890≈
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration         48 CONFIG STRING
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk (Zip)
      iInterface             64 INTERFACE STRING
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0001
  Self Powered

this is the firmware image: program.bin.zip
this is a scan report http://www.virustotal.com/file-scan/...0c8-1307831149
sorry for my bad english, but i'm italian!
EDIT:
My MP4 uses one of this samsung chipset:

[K9F1G08U0M]
[K9F8G08U0M]
[K9F1208U0M]
[K9G4G08U0M]
[K9G8G08U0M] 
[K9K8G08U0M]
[K9F8G08U0M]
[K9F1G08U0A]
[K9F1G08U0B]
[K9F2G08U0M]
[K9K4G08U0M]
[K9K1G08U0M]
[K9WAG08U1M]
[K9F4G08U0M]
[K9LAG08U0M]