mpeg2enc is hosted on a server that does not give the proper MIME type with it. Not a big problem if you option-click (alt-click) the link, so that it downloads immediately to your default download location, without trying to recognize the file first. It will look like a text document, but the installer will change that to a Unix Executable File when copying/installing. The file size should be 492 KB (501,480 bytes).
Without all the binaries, some functions should still work, such as recognizing source files that do not require mplayer, and conversions using ffmpeg presets.