Article in English: Click the "Add Photos/Video" button. This link is at the top of the page, immediately following the "Update Status" and preceding the "Create Photo Album" text. Facebook will only allow you to upload videos in these formats: 3g2, 3gp, 3gpp, asf, avi, dat, divx, dv, f4v, flv,m2ts, m4v, mkv, mod, mov, mp4, mpe, mpeg, mpeg4, mpg, mts, nsv, ogm, ogv, qt, tod, ts, vob, and wmv. You can find the file format by right clicking on the file and choosing "Properties" in Windows or "Get Info" in Mac OS X. You will find the file format listed next to "File Format" in Windows and "Kind" in Mac OS X. Facebook also limits the size and length of the video. You may only upload video which are up to 1gb or 20 minutes, whichever comes first. " The video will take some time to upload, but Facebook will notify you when the video is ready to view.

Summary in Chinese:
打开Facebook官网，并登录你的账户。 浏览你的计算机并选择上传的视频。 点击你想要上传的文件，然后点击“打开”。 点击“发布”来发布你的视频。