https://bugs.winehq.org/show_bug.cgi?id=27244
--- Comment #8 from Adam Bolte abolte@systemsaviour.com --- Sorry, I spoke too soon. It looks like the iv5setup.exe doesn't install correctly unless you select "Custom", and unselect all tick-boxes aside from "Indeo Video 3.2 Codec".
Upon doing this, I can now watch the intro video.