video embedder added

sdkjs-plugins/content/videoembedder/README.md

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+# Video Embedder Plugin
+
+This plugin allows users to embed videos from various platforms directly into their documents using validated URLs. It supports popular video platforms like Bilibili, Youku, QQ, Ixigua, and Iqiyi.
+
+## Features
+- **Automatic ID Extraction:** Extracts video IDs based on platform-specific rules.
+- **Live Preview:** Provides an iframe-based preview of the video before embedding it in the document.
+- **Insert Custom Thumbnail:** Inserts a custom thumbnail in the ONLYOFFICE document. This can can be opened again to preview the video.
+
+## Supported Platforms
+
+### [**Bilibili**](https://www.bilibili.com)
+- **Supported Links:**  
+  `https://www.bilibili.com/video/{videoId}`  
+  Example: `https://www.bilibili.com/video/BV1zv411q7y8`
+
+---
+
+### [**QQ (Tencent Video Player)**](https://v.qq.com)
+- **Supported Links:**  
+  - Cover videos: `https://v.qq.com/x/cover/{coverId}/{videoId}.html`  
+    Example: `https://v.qq.com/x/cover/mzc00200txzcq9a/c0042j0sf2b.html`
+  - Cover videos Type 2 (Works, but not recommended to use.): `https://v.qq.com/x/cover/{videoId}.html`
+    Example: `https://v.qq.com/x/cover/c0042j0sf2b`
+  - Page videos: `https://v.qq.com/x/page/{videoId}.html`  
+    Example: `https://v.qq.com/x/page/c0042j0sf2b.html`
+
+---
+
+### [**Ixigua**](https://www.ixigua.com)
+- **Supported Links:**  
+  `https://www.ixigua.com/{videoId}`  
+  Example: `https://www.ixigua.com/6823310010429010440`
+
+---
+
+### [**Youku**](https://www.youku.com)
+- **Supported Links:**  
+  `https://v.youku.com/v_show/id_{videoId}.html`  
+  Example: `https://v.youku.com/v_show/id_XNDAwMjExMzM2OA==.html`
+
+---
+
+### [**IQIYI**](https://www.iq.com)
+- **Supported Links:**  
+  `https://www.iq.com/play/{videoTitle}-{videoId}?{optionalParams}`  
+  Example: `https://www.iq.com/play/fangs-of-fortune-episode-1-rz7c6zo49o?lang=en_us`
+
+---
+
+## How It Works
+1. **Paste a Video URL:**  
+   Enter a valid URL into the input field.
+   
+2. **Validate the URL:**  
+   The plugin will check if the URL is from one of the supported platforms.
+
+3. **Generate the Embed:**  
+   If valid, the plugin extracts the video ID and displays a live preview using an iframe.
+
+4. **Add to Document:**  
+   The video embed is inserted into your document for viewing.
+
+---