Youtube downloading is not supported anymore.
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Open your instagram app and tap on the options icon of any video that you want to download.
出现选项菜单时你必须点击菜单中的“复制分享网址”选项。
An overlay dialog appears at the bottom of the screen promting you to download the video you have chosen. Tap on the download button.
在屏幕底部会弹出一个显示下载链接的详细信息选项,你可以在这里选择要下载的分辨率。
Once resolution is selected a dialog appears which allows you to change your download location and select number of network threads for fast downloading.
Tap on download button and your download begins. You can tap on the download icon on the top of the screen to view your downloads.