The best way you can make your social videos more engaging is by adding captions.
Especially on Facebook, people tend to play videos muted. With captions, you can easily catch your viewers' attention.
To add a caption, place the playhead on the time when you want the caption to appear
Click the text icon to add the text element to the canvas
You can drag the text to align it neatly on your video. Then just double click on the text to edit, and type in your caption
You can also add shapes to have a background for the text. Just click the Shape icon above the canvas and select a shape.
On the top right change the shape color, and place it on the text. You can then drag the shape layer down to place it below the text.