Try deleting the .mp4 part of the name to leave it as Hadsha.mkv .
Use a versatile player like VLC Media Player which can handle almost any container format regardless of the extension. Hadsha.mkv.mp4
There is an Israeli Hebrew-dubbed title related to Space Jam called "Agada Hadsha" (New Legend). Technical Note on the File Extension Try deleting the
Do you have any about where the file came from or its length to help narrow down exactly what it is? Sharon Cohen | Voice Actors from the world Wikia | Fandom Hadsha.mkv.mp4
The suffix suggests the file might have originally been an MKV (Matroska) container that was renamed to MP4 to improve compatibility with certain players. If the video doesn't play correctly: