Final Cut Express, namely FCE, is an Apple's mid-level editing tool, bringing more features and likeness of FCP(Final Cut Pro).Final Cut Express support editing footage captured in such popular video formats as DV, HDV, and AVCHD.1 or the exported your iMovie ’09 projects. Youtube.com is the most popular video sharing website, we all know. If you surf this website and download a favorite video from youtube video, the video will be in .flv format. Therefore, FCE can't support youtube flv files. Thus, if you want to edit Youtube video with FCE, you will need a Youtube to FCE converter to convert youtube video to Final Cut Express compatible format DV.
Doremisoft Youtube to Final Cut Express Converter is also an excellent FLV to Final Cut Express converter, which enable you to convert Youtube to Final Cut Express on Mac with the following three intuitive steps:
Download video from youtube.com and then launch Youtube to Final Cut Express Converter for mac, to select the Youtube videos you want to import from your hard drive by clicking the “Add File” button.
Click the arrow next to the Profile field and in the down-up profile list. Choose "Common video >.dv"as the output format
Click on the green "START" button to start Youtube to FCE conversion. By default, the folder where the converted files are saved will be opened right after the conversion. After conversion, you can just launch Final Cut Express, and add the converted files to start edit them.