premiere pro cs6
Moving Clips to the Timeline
You move a clip to a sequence in the Timeline by clicking on the clip in the Source pane and dragging it down to the Timeline pane on the lower right.

Drag the clip to one of the video tracks such as Video 1 and release and the clip will be placed in the Timeline.
When you move the first clip to the Timeline, you usually will get a "Clip Mismatch Warning" message box. This is asking you if you want to preserve whatever settings you made for the sequence in the Timeline when you first created this project, or if you want the sequence settings changed to match those of the clip you're importing.

Usually you'll want to select Change Sequence Settings so the sequence matches the settings of the clip you're importing, such as the footage you shot on a video camera that will be used consistently in the movie you're creating.
If there is audio with the clip you're moving to the Timeline, that will automatically be added as one or two new tracks of audio below the video track.
It is possible to drag only the audio portion of a clip to the timeline. Drag the icon that looks like an audio waveform, which appears just below the preview on the Source pane, to the audio tracks in the timeline.

You can also drag only the video portion (without audio) to the timeline. Grab the icons just below the preview on the Source pane that appears like an old film strip, and drag it to the video track of the timeline.

Then you can move additional clips to any point after the first clip in the Timeline by repeating the process - double clicking on a clip in the Project pane to load it in the Source pane, selecting In and Out points and then dragging the clip to a point in the Timeline to the right of the original clip.

