docs: add example video description

Author: zhoushaw

README.md

@@ -26,6 +26,8 @@ Midscene.js is an AI-powered automation SDK with the abilities to control the pa
 
 ## Showcases
 
+The following recorded example is based on the UI-TARS model. The video was recorded using the [UI-TARS 7B SFT](https://huggingface.co/bytedance-research/UI-TARS-7B-SFT) model, and the video has not been sped up at all~
+
 | Instruction  | Video |
 | :---:  | :---: |
 | Post a Tweet      |    <video src="https://github.com/user-attachments/assets/bb3d695a-fbff-4af1-b6cc-5e967c07ccee" height="300" />    |

README.zh.md

@@ -26,6 +26,8 @@ Midscene.js 是一个由 AI 驱动的自动化 SDK，能够使用自然语言对
 
 ## 案例
 
+下面的录制 example 基于 UI-TARS 模型，视频基于 [UI-TARS 7B SFT](https://huggingface.co/bytedance-research/UI-TARS-7B-SFT) 模型录制，视频没有任何加速～
+
 | 指令  | 视频 |
 | :---:  | :---: |
 | 发布一条 Twitter      |    <video src="https://github.com/user-attachments/assets/bb3d695a-fbff-4af1-b6cc-5e967c07ccee" height="300" />    |