Change the "mergedclip.mp4" to the name you want to use for the new merged video file. Press "Enter" and wait for the Mencoder utility to merge the two clips and create the new merged video file.

If not, why not download the River Past Video Cleaner (trialware) and use that to convert your files to .AVI with your favourite codec, then you can use Virtual Dub to join the parts together very ...

You can convert files to the MP4 format on the VLC media player, making them more accessible across your devices.