Fix video player not playing when GalleryVC is opened (#3773)

* Fix video player not playing when GalleryVC is opened

* Update CHANGELOG.md

* Fix swift format

Author: nuno-vieira

CHANGELOG.md

@@ -19,6 +19,7 @@ _August 06, 2025_
 ### 🐞 Fixed
 - Fix the height of the attachment view in the composer when using larger dynamic type [3762](https://github.com/GetStream/stream-chat-swift/pull/3762)
 - Remove animation in message reactions when opening a sheet in the channel view [#3763](https://github.com/GetStream/stream-chat-swift/pull/3763)
+- Fix video player not playable when GalleryVC is opened [#3773](https://github.com/GetStream/stream-chat-swift/pull/3773)
 
 # [4.83.0](https://github.com/GetStream/stream-chat-swift/releases/tag/4.83.0)
 _July 28, 2025_

Sources/StreamChatUI/Gallery/GalleryVC.swift

@@ -249,6 +249,8 @@ open class GalleryVC: _ViewController,
 
     override open func viewDidAppear(_ animated: Bool) {
         super.viewDidAppear(animated)
+
+        updateContent()
         attachmentsCollectionView.scrollToItem(
             at: .init(item: content.currentPage, section: 0),
             at: .centeredHorizontally,