- A video file is a <dfn>container</dfn>. It usually contains one
- <dfn>video track</dfn> and one or more <dfn>audio tracks</dfn>.
- How these tracks are stored in the file is defined by the
- <dfn>file format</dfn>. Common formats are
+ A video file is a <dfn>container</dfn>. It usually contains one
+ <dfn>video track</dfn>, one or more <dfn>audio tracks</dfn>, and possibly <dfn>
+ subtitle</dfn> tracks, <dfn>chapters</dfn>…
+ The way these tracks are stored in the file is defined by the
+ <dfn>file format</dfn>. Common formats are