okay, now i know what's wrong and i fixed 1/2 of it. 1 bss was not null, fixed 2 bink uses seh internally, some videos fail where BinkDoFrame would return 1 or whatever the code was

helpers.asm

@@ -0,0 +1,24 @@
+.code
+
+; void enable_avx2()
+enable_avx2 PROC
+    ; Set CR4.OSXSAVE (bit 18)
+    mov     rax, cr4
+    or      eax, 40000h        ; set bit 18
+    mov     cr4, rax
+
+    ; Read XCR0 (xgetbv, ecx=0)
+    xor     ecx, ecx
+    xgetbv
+
+    ; Enable XMM (bit 0) and YMM (bit 1)
+    or      eax, 6
+
+    ; Write XCR0 (xsetbv, ecx=0)
+    xor     ecx, ecx
+    xsetbv
+
+    ret
+enable_avx2 ENDP
+
+END