diff --git a/tools/chatgui-android/video-tests/build.gradle.kts b/tools/chatgui-android/video-tests/build.gradle.kts
index adea0446..7760f8ab 100644
--- a/tools/chatgui-android/video-tests/build.gradle.kts
+++ b/tools/chatgui-android/video-tests/build.gradle.kts
@@ -17,7 +17,8 @@ kotlin {
             "com/utun/chat/data/StreamAudioMix.kt", "com/utun/chat/data/StreamReadQueue.kt", "com/utun/chat/data/StreamPlaybackTelemetry.kt",
             "com/utun/chat/data/StreamCaptureEngine.kt", "com/utun/chat/data/StreamCaptureConfig.kt",
             "com/utun/chat/data/TelecomCallManager.kt", "com/utun/chat/data/UtunConnection.kt", "com/utun/chat/data/UtunConnectionService.kt",
-            "com/utun/chat/data/QrScannerSession.kt", "com/google/**")
+            "com/utun/chat/data/QrScannerSession.kt", "com/utun/chat/data/VideoFilePlayer.kt",
+            "com/utun/chat/data/VideoFileMetadata.kt", "com/google/**")
     }
 }
 dependencies {
diff --git a/tools/chatgui-android/video-tests/src/main/kotlin/android/media/HostFileVideo.kt b/tools/chatgui-android/video-tests/src/main/kotlin/android/media/HostFileVideo.kt
new file mode 100644
index 00000000..fbda6a83
--- /dev/null
+++ b/tools/chatgui-android/video-tests/src/main/kotlin/android/media/HostFileVideo.kt
@@ -0,0 +1,67 @@
+package android.media
+
+import android.view.Surface
+
+/** Только управляемая граница MediaPlayer: callbacks и отказы SDK, без декодирования. */
+class MediaPlayer {
+    companion object {
+        const val VIDEO_SCALING_MODE_SCALE_TO_FIT = 1
+        val created = mutableListOf<MediaPlayer>()
+        var nextFailures = emptySet<String>()
+    }
+    var failures = nextFailures
+    var released = false
+    var releases = 0
+    var starts = 0
+    var pauses = 0
+    var seeks = 0
+    var surface: Surface? = null
+        private set
+    var position = 0
+    val currentPosition: Int get() { check("position" !in failures && !released); return position }
+    val duration: Int get() { check("duration" !in failures); return 10_000 }
+    val videoWidth = 1280
+    val videoHeight = 720
+    var preparedCallback: ((MediaPlayer) -> Unit)? = null
+    var completedCallback: ((MediaPlayer) -> Unit)? = null
+    var errorCallback: ((MediaPlayer, Int, Int) -> Boolean)? = null
+    init { check("construct" !in failures); created.add(this) }
+    fun setOnPreparedListener(callback: (MediaPlayer) -> Unit) { preparedCallback = callback }
+    fun setOnCompletionListener(callback: (MediaPlayer) -> Unit) { completedCallback = callback }
+    fun setOnErrorListener(callback: (MediaPlayer, Int, Int) -> Boolean) { errorCallback = callback }
+    fun setVideoScalingMode(mode: Int) { check("scaling" !in failures) }
+    fun setDataSource(path: String) { check("source" !in failures) { "MediaPlayer source failed" } }
+    fun prepareAsync() { check("prepare" !in failures) { "MediaPlayer prepare failed" } }
+    fun start() { starts++; check(!released && "start" !in failures) { "MediaPlayer start failed" } }
+    fun pause() { pauses++; check(!released && "pause" !in failures) { "MediaPlayer pause failed" } }
+    fun seekTo(value: Int) { seeks++; check(!released && "seek" !in failures); position = value }
+    fun setSurface(value: Surface?) {
+        check(!released && "surface" !in failures) { "MediaPlayer surface failed" }; surface = value
+        check("surface after" !in failures) { "MediaPlayer surface failed after effect" }
+    }
+    fun release() {
+        releases++; check("release" !in failures) { "MediaPlayer release failed" }; released = true; surface = null
+        check("release after" !in failures) { "MediaPlayer release failed after effect" }
+    }
+}
+
+class MediaMetadataRetriever {
+    companion object {
+        const val METADATA_KEY_VIDEO_WIDTH = 18; const val METADATA_KEY_VIDEO_HEIGHT = 19; const val METADATA_KEY_VIDEO_ROTATION = 24
+        val created = mutableListOf<MediaMetadataRetriever>()
+        var nextFailures = emptySet<String>()
+    }
+    var failures = nextFailures
+    var released = false
+    var releases = 0
+    var width = "1280"; var height = "720"; var rotation = "90"
+    init { created.add(this) }
+    fun setDataSource(path: String) { check("source" !in failures) { "Metadata source failed" } }
+    fun extractMetadata(key: Int): String? = when (key) {
+        METADATA_KEY_VIDEO_WIDTH -> width; METADATA_KEY_VIDEO_HEIGHT -> height; METADATA_KEY_VIDEO_ROTATION -> rotation; else -> null
+    }
+    fun release() {
+        releases++; check("release" !in failures) { "Metadata release failed" }; released = true
+        check("release after" !in failures) { "Metadata release failed after effect" }
+    }
+}
diff --git a/tools/chatgui-android/video-tests/src/main/kotlin/com/utun/chat/VideoHostApp.kt b/tools/chatgui-android/video-tests/src/main/kotlin/com/utun/chat/VideoHostApp.kt
index a6899333..b27d4cd6 100644
--- a/tools/chatgui-android/video-tests/src/main/kotlin/com/utun/chat/VideoHostApp.kt
+++ b/tools/chatgui-android/video-tests/src/main/kotlin/com/utun/chat/VideoHostApp.kt
@@ -13,4 +13,5 @@ object R { object string {
     const val stream_waiting_decoder = 7; const val stream_group_closed = 8; const val chat_service_stopped = 9
     const val stream_source_changed = 10; const val stream_member_removed = 11; const val stream_failed = 12
     const val stream_decoder_unsupported = 13
+    const val video_open_failed = 14; const val video_playback_failed = 15
 } }