[Attribute Name] src [Attribute Type] DOMString a local URI referencing a MediaStream [Additional considerations] 
The markup author can use this attribute to specify the source of the media. createObjectURI can be used to generate a URI referring to a MediaStream which can be used as the value of this attribute. In such a case, revocation of the URI does not count as a change to this field and does not trigger the media element load algorithm.