Copy files to bundle depending on active configuration

is it possible to control which files are copied to the bundle depending on the active configuration? I don't want to add another target for this, so this not an option.

The real life example is a splash video which is in fact 8mb in size and is long. Every start of the app shows this video which is annoying. I don't want to break too much code so the solution is a very short splash video, which is the candidate to be copied to the bundle when the debug configuration is active.

Yes, I could make the debug video very small so it doesn't hurt if it is shipped with the release but for the sake of learning new things I need a way to control which file is copied depending on the configuration. I suppose a Run Script would do this, but maybe there is a simple solution which I don't see.

Thanks in advance!