[Bug]: Native HTML5 video fullscreen is unavailable

[agzamovuz-del]

Telegram Application

Telegram for Android

Describe the Bug

Telegram Application:
Telegram for Android

Description:
Telegram Mini Apps on Android do not allow native HTML5 video fullscreen.

I tested this with a native <video controls playsinline> player inside a Mini App.
The same video playback works, but the fullscreen button in the native controls is disabled in Telegram for Android.

This is not limited to iframe-based players:

• Bunny Stream iframe fullscreen does not work
• native HTML5 <video> fullscreen also does not work
• the fullscreen icon in Android video controls is disabled

Outside Telegram Mini App, the same video can play normally in a regular browser.

Describe the Bug:
Inside Telegram Mini App on Android, native video fullscreen is unavailable.
The fullscreen control is disabled even when using a direct/native video element instead of an iframe.

To Reproduce

Steps to reproduce the behavior:

1. Create a minimal Mini App page with native video:

   <video controls playsinline width="100%" src="YOUR_VIDEO_URL"></video>

or use HLS with hls.js and attach it to a native

2. Open the page in Telegram for Android as a Mini App.
3. Start playback.
4. Try to use the fullscreen control from native video controls.

Expected Behavior

Expected Behavior:
The video should be able to enter native fullscreen mode, or the platform/docs should explicitly expose that fullscreen video is unsupported in Telegram for Android Mini Apps.

Actual Behavior:
The fullscreen control is disabled and fullscreen cannot be entered.

Notes:

Reproduced with iframe player and with native

SDK: @tma.js/sdk 3.1.8