With tools like Aura FLV Player, no need to convert the internet downloaded videos to enjoy them.
Aura FLV Player is a video player that can play back a flash video (FLV) and convert a dozen of formats into FLV. It allows the user to start up, to pause or stop the play back at any time, to watch the video in its normal size, in dual or full screen. It can add several tracks simultaneously and create a playlist so that there is no need to manually add a file. The interface is customizable, which allows you to display or to hide the control panel, to change the style of the control bar, to change the button colors, etc.