You
can insert an entire clip after a selected frame in the target clip.
To
insert a clip:
Click
Insert in the Editing menu.
Select
Clip from the Insert Mode option box.
Select
the source clip.
Select
an insertion-point frame in the target clip.
The source clip is inserted after the selected
frame in the target clip. The remaining frames of the target clip
are placed at the end of the inserted clip.