docs(ios): describe 'quality' in CaptureVideoOptions

README.md

@@ -365,12 +365,15 @@ capturing a video clip, the `CaptureErrorCB` callback executes with a
 
 - The __limit__ property is ignored.  Only one video is recorded per invocation.
 
+- iOS supports an additional __quality__ property, to allow capturing video at different qualities.  A value of `0.5` ( the default ) means medium quality, value of `1` means high quality and value of `0` means low quality.
+  See [here](https://developer.apple.com/documentation/uikit/uiimagepickercontroller/1619154-videoquality?language=objc) for more details.
+
 ### Android Quirks
 
 - Android supports an additional __quality__ property, to allow capturing video at different qualities.  A value of `1` ( the default ) means high quality and value of `0` means low quality, suitable for MMS messages.
   See [here](http://developer.android.com/reference/android/provider/MediaStore.html#EXTRA_VIDEO_QUALITY) for more details.
 
-### Example ( Android w/ quality )
+### Example ( w/ quality )
 
     // limit capture operation to 1 video clip of low quality
     var options = { limit: 1, quality: 0 };