fix: revert pip change for iphone and add comment

src/js/support.js

@@ -38,6 +38,13 @@ const support = {
   // Picture-in-picture support
   // Safari & Chrome only currently
   pip: (() => {
+    // While iPhone's support picture-in-picture for some apps, seemingly Safari isn't one of them
+    // It will throw the following error when trying to enter picture-in-picture
+    // `NotSupportedError: The Picture-in-Picture mode is not supported.`
+    if (browser.isIPhone) {
+      return false;
+    }
+
     // Safari
     // https://developer.apple.com/documentation/webkitjs/adding_picture_in_picture_to_your_safari_media_controls
     if (is.function(createElement('video').webkitSetPresentationMode)) {