You don't need to precompress the data to find the bink2 data. It's there in plaintext.
Cut from mesa:
Code:
Possible media at 0x00000002447F695E, size 38398252, type 'bk2'
Possible media at 0x0000000246C9528A, size 7295388, type 'bk2'
Possible media at 0x000000024738A426, size 19681400, type 'bk2'
Possible media at 0x000000024864F49E, size 19954292, type 'bk2'
Possible media at 0x0000000249956F12, size 19175688, type 'bk2'
Possible media at 0x000000024ABA081A, size 23945160, type 'bk2'
Possible media at 0x000000024C2767E2, size 23441796, type 'bk2'
Possible media at 0x000000024D8D1966, size 27112728, type 'bk2'
Possible media at 0x000000024F2ACE7E, size 32755048, type 'bk2'
Possible media at 0x00000002511E9BE6, size 26470388, type 'bk2'
Possible media at 0x0000000252B283DA, size 1535932, type 'bk2'
Possible media at 0x0000000252C9F396, size 4926428, type 'bk2'
Possible media at 0x0000000253151F72, size 348236, type 'bk2'
Possible media at 0x00000002531A6FBE, size 6378408, type 'bk2'
Possible media at 0x00000002537BC366, size 7157732, type 'bk2'
Possible media at 0x0000000253E8FB4A, size 594098992, type 'bk2'
Possible media at 0x000000027752367A, size 838915148, type 'bk2'
Possible media at 0x00000002A9530AC6, size 576688184, type 'bk2'
Possible media at 0x00000002CBB29AFE, size 120534324, type 'bk2'
Possible media at 0x00000002D2E1D032, size 124427520, type 'bk2'
Possible media at 0x00000002DA4C6D32, size 440595344, type 'bk2'
Possible media at 0x00000002F48F60C2, size 299554936, type 'bk2'