Obsolete
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.
The label read-only property of the TrackDefault interface returns the default label for an associated SourceBuffer to use when an initialization segment does not contain label information for a new track.
Syntax
var mylabel = TrackDefault.label;
Value
A DOMString.
Example
TBD
Browser compatibility
BCD tables only load in the browser