You can Play Flash (.flv) files in your article, as long as the file is hosted on a web server on the web.
How?
Find the URL to this Flash file (with extension .flv) - Go to your article editor and type in brief text - highlight this text and link it to the URL […]

You can Play Flash (.swf) files in your article, as long as the file is hosted on a web server on the web.
How?
Find the URL to this Flash file (with extension .swf) - Go to your article editor and select ‘F’ next to the ‘A’ (in yellow) - box will appear type in […]

Add video to article.
How?
Log int o your Admin panel.  Go to your content editor for Posts or Pages. In the content editor menu click the “A” yellow icon, a box will appear asking you for the URL to the content this will typically start with “http://blah.com/etc..” this is the Video URL:  link to the video. […]