When a user selects your Page Tab, you will received the signed_request parameter with one additional parameter, page. This parameter contains a JSON object with an id (the page id of the current page), admin (if the user is a admin of the page), and liked (if the user has liked the page). https://developers.facebook.com/docs/appsonfacebook/pagetabs/
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当用户选择您的“页面”选项卡时，您将收到signed_request 参数以及一个附加参数“page”。此参数包含一个 JSON 对象，其中包含 id（当前页面的页面 id）、admin（如果用户是页面的管理员）和 Like（如果用户喜欢该页面）。
https://developers.facebook.com/docs/appsonfacebook/pagetabs/
您可以使用 Graph API 将视频上传到页面，请参阅以下博客文章：https://developers.facebook.com/blog/post/515/#video_upload
When a user selects your Page Tab, you will received the signed_request parameter with one additional parameter, page. This parameter contains a JSON object with an id (the page id of the current page), admin (if the user is a admin of the page), and liked (if the user has liked the page).
https://developers.facebook.com/docs/appsonfacebook/pagetabs/
You can upload a video to a page using the Graph API, see the following Blog post: https://developers.facebook.com/blog/post/515/#video_upload