If this is a file you downloaded and it is not opening, or if you suspect it is corrupted, you might need to re-download it from the source. To give you a better report, could you tell me: did you download or find this file?

The name "UralMountainsDVD" strongly suggests it likely contains footage, photos, or data related to a trip, documentary, or survey of the Ural Mountain range in Russia.

If you can provide more context, I can help you figure out what this file is.