Thats exactly the main reason I don't like the video section and would prefer attached video files in a reasonable format. Flash videos ever so often fail or stall and no chance to step through them frame by frame back and forth, as would often be necessary in the videos we share. Nonetheless I fear its not a good idea to wait for a download implementation by PTC.
You may google for "flash videos download" and try the various programs and add-ins for your browser, but the quality of the swf's usually will not be worth the effort.