Set playback speed controls to initial playback rate

Otherwise, the Video can be initiated with playback rate 0.5 and
play correctly (slower), but in native playback speed controls 1.0
will be marked as current playback speed.

Author: sharnik

ios/Video/RCTVideo.swift

@@ -1164,6 +1164,14 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
 
         viewController.view.frame = self.bounds
         viewController.player = player
+
+        // Set the initial playback speed in controls to match playback rate
+        if #available(iOS 16.0, *) {
+            if let initialSpeed = viewController.speeds.first(where: { $0.rate == _rate }) {
+                viewController.selectSpeed(initialSpeed)
+            }
+        }
+
         if #available(iOS 9.0, tvOS 14.0, *) {
             viewController.allowsPictureInPicturePlayback = _enterPictureInPictureOnLeave
         }