if I may ask, what programming language did you use to create this app to convert .VS4 files to MP4 ?
After learning several computer languages, like some basic dialects, some Pascal dialects, DOS, Excel, Forth and Cobol I finally found my peace in Visual Basic .NET.
In it I can do everything I want to do on my computer in a fairly easy and readable way, like
* Making my Corsair Nightsword mouse and my Corsair K55 RGB Pro XT keyboard work together in a great way
* Making my own interpreter for Scott Adams Adventure games
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* Finally making a good Editor for UCSD P-code Pascal.
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(scroll down)
* A program to make drawings on the computer:
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* But also some more useful programs such as changing all file names in a folder and for example using data from Excel to make different graphs.
The program to make a video from a VS4 file is actually a fairly simple program:
You read the vs4 file into a buffer and then you always first XOR it like this:
For p = 0 To 1500000
buff(p) = buff(p) XOR &HAA
Next
Hereafter the following:
* For the Supreme files the bytes in positions 112, 113, 114 are as text "vsp" or in HEX &H76, &H73, &H70. (&H = HEX value) If this is the case, you need to adjust the following bytes:
buff(0) = &H52 ' R
buff(1) = &H49 ' I
buff(2) = &H46 ' F
buff(3) = &H46 ' F
buff(112) = &H78 ' x
buff(113) = &H76 ' v
buff(114) = &H69 ' i
buff(115) = &H64 ' d
buff(188) = &H58 ' X
buff(189) = &H56 ' V
buff(190) = &H49 ' I
buff(191) = &H44 ' D
* For the HD files, buff(113) has a space or &H20
In this case, only adjust the first four bytes:
buff(0) = &H52 ' R
buff(1) = &H49 ' I
buff(2) = &H46 ' F
buff(3) = &H46 ' F
* If there is no space on buff(113) and there is no "vsp" on positions 112, 113, 114 then it is the new MP4 file and you only need to adjust the first 3 bytes:
buff(0) = 0
buff(1) = 0
buff(2) = 0
So now you only need to make a nice appearance of the program and you are ready!!
Edit 2025-06-17: 'buff(113) has a space or &H32' had to be of course 'buff(113) has a space or &H20', 32 is the decimal notation of &H20 ....
It's not polished and kinda working only in first couple secund, but it can be very nice once the main interface and what's more important whole play of interaction will work. I think the full screen button is necessary, bc when i try double clink on center it will stop and stretch video for me (interface is gone by then). 
