Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
 msIsStereo3D is a read-only property which determines whether the system considers the loaded video source to be stereo 3-D or not. 
This proprietary property is specific to Internet Explorer and Microsoft Edge.