Indeed.

The TrueStory.h5c file contains 3 h5m files inside. You need to unpack them into the h5c file (so that there are 2 folders, UseeCampaigns and Maps), then it should work. You can put everything in Maps and play them separately, as I did, because there's still something strange with the campaign.

If Florkingold doesn't mind, I'll try to pack the campaign correctly and provide a link. But definitely in the evening, not now, sorry.