chore(docs): Update Reference.md (#359)

I was able to fix a bug with videos loaded from Azure that wouldn't start unless I set that prop to `false`

docs/Reference.md

@@ -113,7 +113,9 @@ Set this to provide JavaScript that will be injected into the web page when the
 
 ### `mediaPlaybackRequiresUserAction`
 
-Boolean that determines whether HTML5 audio and video requires the user to tap them before they start playing. The default value is `true`. (Android API minimum version 17)
+Boolean that determines whether HTML5 audio and video requires the user to tap them before they start playing. The default value is `true`. (Android API minimum version 17).
+
+NOTE: the default `true` value might cause some videos to hang loading on iOS. Setting it to `false` could fix this issue.
 
 | Type | Required |
 | ---- | -------- |