Import flv to windows movie maker is not as simple as you think, if you tried to import flv video to windows movie maker, you must found it is impossible for you to import flv to windows movie maker directly. What should you do if you want edit flv video with WMM?
FLV, or Flash Live Video file, is a preferred file format that is designed for web playback, offering high rates of compression to deliver video over the Internet using Adobe Flash Player. Windows Movie Maker is a video creating/editing software, included in Microsoft Windows Me, XP, and Vista. It contains features such as effects, transitions, titles/credits, audio track, timeline narration, and Auto Movie.
The WMM support format like asf, avi, wmv, MPEG1, mpeg, mpg, m1v, mp2 but no .flv, so you can't import flv to windows movie maker directly. If you want edit flv video with Windows Movie Maker, you need a third part app to convert flv to windows movie maker support format like wmv.
Flv to Windows Movie Maker Converter is the best choice for you to import flv to windows movie maker, with the wmm import flv converter you can convert flv to wmv or avi easily in several simple steps, and then import flv to windows movie maker, edit flv with wmm at the end.