Check if your camera manufacturer offers an additional "Codec Pack" download. Alternatively, try loading the file into VLC Media Player equipped with the K-Lite Codec Pack, though success varies with encrypted files. The Player Installs but Shows a Black Screen
EPview for Windows OS (64 bit) V1.4 Installer - Life Science
Sometimes the hardest software to install holds the most valuable memories—just be sure you trust the source before you click.
With the player successfully installed, you can now view your footage.
The most reliable way to play .epv files is using the that corresponds with your camera model.
Double-click the downloaded .dmg file to open the installer window. Drag the EPV Player icon into your folder. Open your Applications folder and double-click the player.