You can download a video from web pages which contain video. So, firstly, please, check if you are on a web-page which contains a video and this video is playing in your browser.

If a video is detected and ready to be downloaded, you will see the 'Download' button active and notice box popping out to let you know that the video is ready to be downloaded.

If you see the video on the page playing, but you still receive a message that the video is not found it means that for now we don’t support such a video format.

We constantly work on improvement of our Video Downloader, so check the beta version of it on http://beta.ant.com/video-downloader . Maybe beta version already supports this format ;).