USV is a program which allows you to watch movies with subtitles.
There is already many program like this on Internet, so why should you use this one instead of the others :
It is really easy to use : just open a movie file and USV automatically search for the subtitle files (in the current directory, a current sub-directory and another directory you have configured).
You can use Open With ... USV in Explorer.
USV supports 14 formats (see 3. Supported Formats).
You can switch very easyly and quickly between different subtitle files.
You can convert any of the supported format to SubRip format (*.srt).
You can merge two (or more) subtitle files in one : for this you just have to press the space bar when the first subtitle of the second file should appear. If the result is ok, you just have to save.
USV offers you the easiest way to resynchronize a subtitle file if the subtitles display too fast/slow and/or if there is a shift: for this you choose 4 subtitles and then you press the space bar to indicate when each of the subtitles you choosed should appear. If the result is not perfect, try again without reloading a subtitle file. My advice is to use subtitles distant of 1 min at least and then it is often perfect at the first try.