How to Add Captions and Subtitles Your Videos in QuickTime. The media subtitle players listed below comply with most of the demands above, and all of them are for free. The more subtitle customizing options they have, the better another appreciated feature is automatically searching for subtitles online. A good modern media player needs to meet several requirements, such as supporting a wide range of formats, having a user-friendly and intuitive interface, embedding, and video player with subtitles.