Step 3: Click "Choose Video " button and you'll see a menu. Then click "Open File " button and you'll see a dialog. Choose the disk of your Video.
Before conversion, you can make yourself settings. Avex iPhone Video Converter provide six file quality, they are "iPhone - Excellent quality(h264)", "iPhone - Excellent quality(mpeg4)", "iPhone - Good quality(h264)", "iPhone - Good quality(mpeg4)","iPhone - Medium quality(h264)", "iPhone - Medium quality(mpeg4)". You can choose one of them.