Import the video and play it in media viewer.
Drag and drop it on timeline and play it in sequence viewer.
split the clip just before the end.
Go to effects. click on add effect, click on rendering then click on rich text.
Click on edit text. Select the text then click on color option pick one color and click on ok button type the text.
To change the font again select entire text click on font dropdown and click on the font name.
Change the weight of font by making bold or extra bold.
To change the text size again select it and drag the size slider once everything is set click on ok button.
Set the vertical alignment for text by clicking on vertical alignment dropdown and select the position.
Check the shadow box to add shadow effect to our text. click on shadow color and pick a color for shadow and then click on ok
Change the setting of shadow by dragging each options slider.
Now to add scrolling effect to our credits click on auto scroll dropdown and choose the direction