The wizard first inspects the version of MLT  installed on the system. MLT is the engine which performs the heavy lifting in Kdenlive, so it is critical that the correct version of MLT is installed and working correctly.
MLT in turn relies on FFmpeg  to handle various types of audiovisual material. The wizard displays the capabilities of the local FFmpeg installation, because this essentially determines the type of video material Kdenlive can handle.
If your camera or computer are a little older, regular standard definition might be more suitable. Click the DV radio button to hide the high definition options and select an appropriate SD profile.
Once the wizard is complete, the main window appears.