docs: keep README demo video only

README.md

@@ -6,8 +6,6 @@ experiments, and ongoing tracking of newer Telegram client behavior.
 
 [Website](https://telesrv.net) · [Discussion group](https://t.me/telesrv_chat) · [Channel](https://t.me/telesrv) · [中文 README](README.zh-CN.md)
 
-![gramsrv multi-device Desktop and Android preview](docs/assets/readme-hero.png)
-
 `gramsrv` is independent and unofficial. It is not affiliated with, endorsed by,
 or sponsored by Telegram or the official Telegram team.
 
@@ -52,12 +50,6 @@ For downloads, public information, and the current hosted experience entry,
 visit [telesrv.net](https://telesrv.net). For questions, compatibility reports,
 and development discussion, join [t.me/telesrv_chat](https://t.me/telesrv_chat).
 
-## Screenshots
-
-| Telegram Desktop | Android |
-|---|---|
-| <img src="docs/assets/tdesktop1.png" alt="Telegram Desktop connected to gramsrv" width="520"> | <img src="docs/assets/android1.png" alt="Android client connected to gramsrv" width="260"> |
-
 ## Maintenance and Version Tracking
 
 `gramsrv` does not treat one pinned client build as the end of the work. The

README.zh-CN.md

@@ -4,8 +4,6 @@
 
 [官网](https://telesrv.net) · [讨论群组](https://t.me/telesrv_chat) · [频道](https://t.me/telesrv) · [English README](README.md)
 
-![gramsrv Desktop 与 Android 多设备预览](docs/assets/readme-hero.png)
-
 `gramsrv` 是独立的非官方项目，与 Telegram 官方及其团队没有关联，也未获得其背书或赞助。
 
 ## 演示视频
@@ -30,12 +28,6 @@
 
 下载、公开说明和当前体验入口见 [telesrv.net](https://telesrv.net)。问题交流、兼容反馈和开发讨论可以加入 [t.me/telesrv_chat](https://t.me/telesrv_chat)。
 
-## 截图
-
-| Telegram Desktop | Android |
-|---|---|
-| <img src="docs/assets/tdesktop1.png" alt="Telegram Desktop connected to gramsrv" width="520"> | <img src="docs/assets/android1.png" alt="Android client connected to gramsrv" width="260"> |
-
 ## 持续维护与版本追踪
 
 `gramsrv` 不会把某一个固定客户端版本当成终点。固定 Telegram Desktop 基线用于保证回归可复现；新的 Telegram Desktop 与 Android 版本会通过真实客户端启动/同步 trace、兼容矩阵更新和聚焦适配任务持续跟进。