Hello and welcome to our forums,
In order to achieve what you want, you could add the
"vlc-3.0.18-win32.exe" as a
"feature based" prerequisite in the
"Prerequisites" page.
Or you can use our "EXE to MSI" converter, which does the same thing.

- Screenshot_127.png (59.68 KiB) Viewed 5973 times
Here, we should also be aware what the silent switches for
"vlc-3.0.18-win32.exe" are, so we can pass them when required.
Please note that this requires an
"Enterprise" suite or above.
Hope this helps!
Best regards,
Catalin