A Video addon, as the name suggests, enables to embed various video films in a presentation, including the corresponding subtitles. The captions are to be put in a regular text file and uploaded using the Properties menu options.
Now the Video module also offers the possibility of displaying various mathematical formulas in the subtitles text, which makes things much easier for those who have to deal with presentations related to Mathematics or Science. The formulas can be created using the LaTeX symbols and commands. Here you can find some more useful information on how to use them in the Editor.
A full Video addon description is available here. If you wish to view a short Demo presentation, click here.