At the end-
To add credits take the playhead at the end of the video.
Click on titles tab click on basic. Drag & drop credits 1 on timeline. Click on the play button to check it. Double click on it to edit it.
Click inside the textbox and type the text.
Same way you can edit credits 2 template.

On top
Drag & drop credits on top of the video track to make it appear on video.