feat(OHIF):Add DICOM Video Display

* feat(OHIFv3):Add a video viewport

* Fixed a couple of viewing issues

* fix(OHIF):If not all instances are used by a given provider, then continue to add items

* Added video data

* Add a basic e2e test for video display

* Adding a screen shot as requested

extensions/dicom-video/README.md

@@ -0,0 +1,15 @@
+# DICOM Video
+This extension adds support for displaying DICOM video objects in a script tag.
+The video data must currently be available as video/mp4 on the BulkDataURI that
+is provided in the DICOMweb metadata response, and the video must have one of the
+specified SOP Class UID's in order to be recognized by the SOP class handler.
+
+Those are:
+* Video Microscop Image Storage
+* Video Photographic Image Storage
+* Video Endoscopic Image Storage
+* Secondary Capture Image Storage
+* Multiframe True Color Secondary Capture Image Storage
+
+The extension is a "standard" extension in that it is installed and available
+by default.