Okay, so here's a rundown of audio codecs(based on the 0x00000001 format) used in MGS2(referenced in offset 0xA): 0x00 - PlayStation ADPCM 0x01 - XOR(0x7)'d IMA ADPCM 0x02 - Unknown ADPCM type 0x11 - IMA ADPCM
There is a sample at that MEGA folder I posted that says "MGS2_MOVIE_0110.rar". The .sdt file has the 0x00010001 and 0x00020001 IDs extracted as .bin files. So I had to modify the sdt_demux.py once again to assign an extention to these ID formats(.sdx_1 and .sdx_2 respectively, to avoid confusion). Here.