Ok i have checked it, and maybe somebody will need it. If anybody would like to use VigemBusDriver installer in Wix Bootstraper project, there is a possibility to attach only URL, but Wix requires much more than URL to allow to download VigemBusDriver.exe
It requires RemotePayload information, and part of this payload is a Hash="SHA-1-checksum-here" so its tightly coupled to specific exe file. So You can't link it with an URL where exe file will be changed, for example with always the newest version of VigemBusDriver.
Instead of filling all RemotePayload properties, Wix can do it for you. You need only have VigemBusDriver.exe locally, put its path under SourceFile key and set Compressed to "no", like in example:
<ExePackage Id="ViGemBus" DownloadUrl="http://github.com/ViGEm/ViGEmBus/releases/download/v1.16.112/ViGEmBus_Setup_1.16.115.exe" SourceFile="$(var.ProjectDir)\..\Libs\ViGEmBus_Setup_1.16.115.exe" Compressed="no" Cache="yes" PerMachine="yes" Permanent="yes" Vital="yes"/>
In the end Wix wont pack exe file into installer and will try to download it directly from DownloadUrl