1.DDV files are movie files used by the game. They are in Masher format,see formats/ddv.h for basic informations
2.Sounds.dat contains every sound of the game.
It's mainly cat sound1 sound2 sound3 > sounds.dat, and doesn't contain
any index table.It's mono, 16 bits Little Endian PCM. Not sure about the rate, though.It doesn't contain any index table. Those are probably in VAB files.
3.BAN archives are sprites. They can contain a single Anim file
4.BND archives can contain several Anim, Path, Font, or Palt files
5.FNT archives contain Font files.
6.VH and VB archives' meaning is yet unknown
7.BSQ archives' meaning is yet unknown
8.VH archives are VAB (playstation sound bank) headers. VB archives are VAB (playstation sound bank) data
9.CAM archives are 'screens', they include a background image of Bits format,and can contain Font, FG1 and Demo files if needed.
10.SAV seems to be plain memory dump with an optional NxtP header.
11.DDV video format
Abe's Odyssey seems to have another version of it, referred to as MOIR AKIK
Abe's Exoddus version struct DDVVideoHeader
Hope this helped