Best answer as chosen by user dinahkrell: Usually some Flash. And BEWARE!!!
by R. Proffitt - 9/15/12 2:45 PM
In Reply to: What is an FLV_27 file? What software will convert it? by dinahkrell
There are sites that have folk install infected decoders. Try this player -> http://www.videolan.org/vlc/index.html
For more information about this content, try MEDIA INFO as well as answer Kees's questions.