Lots of online videos these days are encoded in Flash Video format. The problem is that not all media players support the format, so you'll need to get yourself a third-party app to convert it for you.
Pazera Free FLV to AVI Converter is one such utility and as the name suggest it allows you to transform a Flash Video file into an AVI. The program also lets you convert your FLV video to an MPEG if you so desire.
Pazera Free FLV to AVI Converter's user interface isn't exactly a visual delight and despite the fact that there isn't an icon in sight, it's pretty functional and you should be able to find your way around pretty easily. All you really need to do with Pazera Free FLV to AVI Converter is load the FLV file or files that you need to convert using the 'Add Files' button, then click convert. The conversion process seems to be reliable and quick (though obviously this depends on the size of the file).
There are plenty of advanced options to tinker around with in Pazera Free FLV to AVI Converter if you know what you're doing. For instance, you can adjust the audio and video codecs used, set the resolution or change the bitrate (only for AVI). You can even crop the video on all sides with Pazera Free FLV to AVI Converter if you want.
If you want a no-frills solution for converting FLV files, Pazera Free FLV to AVI Converter is an able piece of software.
