RealA2V

RealA2V is a lightweight and easy-to-use piece of kit that enables you to make audio files compatible with video playback on online services such as YouTube or Facebook.
The software application integrates a handful of options, which are easy enough to be tinkered with by users of any level of experience.
Installing RealA2V does not take a long while, nor special input, as it implements standard options. Its interface is based on a regular window with a plain and simple layout. It is not particularly attractive but fairly easy to work with.
Pointing out an audio track is done with the help of the file browser only (since the drag-and-drop function is unsupported), along with batch processing, which means you can process only one track at a time.
It is necessary to establish a video picture (from a predefined list) and output destination to start conversion. Plus, you can select the video codec to use. Before doing so, however, it is possible to preview the track in a built-in player, as well as to find out how the video with the selected picture will look like.
RealA2V has a good response time and finishes a task very quickly while using low CPU and memory, so it does not hog system resources. We have not come across any kind of issues throughout our evaluation, as the tool did not hang, crash or pop up errors. Too bad it has not been updated for a long time, though.