Standing on the angle of costumer, our software do have this function, It can help costumer to check whether the movie/audio that they just added was right or not.
To preview your movie/audio files you just need to check this out.
As you can see a small red box on the screenshot below.

Here you can play the movie/audio files by play button, pause and stop function were all supported.
Our software also provide the dragging function. You can drag it to the time whatever you want. The video quality is pretty good in the preview window.