Once you've installed the extension, head to any video page, and then click the DownloadHelper button button (see screenshot below) to see a list of the available media to download on that page.
一旦装了扩展，访问视频页面，然后单击“Video DownloadHelper”按钮(见下方截图)，就会看到这个页面上可下载的视频列表。
Once you've installed the extension, head to any video page, and then click the DownloadHelper button button (see screenshot below) to see a list of the available media to download on that page.
一旦装了扩展，访问视频页面，然后单击“Video DownloadHelper”按钮(见下方截图)，就会看到这个页面上可下载的视频列表。
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