[Video] Add loading state to player (#5149)

patches/expo-video+1.2.4.patch.md

@@ -3,6 +3,7 @@
 ## `expo-video` Patch
 
 ### `onEnterFullScreen`/`onExitFullScreen`
+
 Adds two props to `VideoView`: `onEnterFullscreen` and `onExitFullscreen` which do exactly what they say on
 the tin.
 
@@ -16,3 +17,15 @@ ourselves.
 Instead of handling the pausing/playing of videos in React, we'll handle them here. There's some logic that we do not
 need (around PIP mode) that we can remove, and just pause any playing players on background and then resume them on
 foreground.
+
+### Additional `statusChange` Events
+
+`expo-video` uses the `loading` status for a variety of cases where the video is not actually "loading". We're making
+those status events more specific here, so that we can determine if a video is truly loading or not. These statuses are:
+
+- `waitingToPlayAtSpecifiedRate`
+- `unlikelyToKeepUp`
+- `playbackBufferEmpty`
+
+It's unlikely we will ever need to pay attention to these statuses, so they are not being include in the TypeScript
+types.