This is the codec package of Video Converter for ARMv8 processors (AArch64).
Video Converter can automatically detect the architecture of your device and redirect you to the correct codec package.
So, on first time start simply open the requested link, install the right codec and restart the application. Core files will be copied by Video Converter for Android and you'll be able to use it in few seconds.
Instead, if you came here in other ways, make sure you know the right CPU architecture before installing this, because if it's wrong Video Converter will ask you to download another package.