Not all videos come with hard coded timestamps. If you want to add one to your video clip before you export it you can do this in the annotation tab. In the annotation tab select your clip and add a spotlight and then click Add Text.
In the Add Text box check the Use Timestamp checkbox to add the timestamp and then click Add Text. (This dialog can also let you add any text to the video, e.g. “suspect 1”)
Now you’ll have the timestamp but if you leave the default colour you’ll also have a nice big red circle just underneath it. To remove the circle – change the colour to transparent by clicking though the various colours.
If the white text doesn’t show up well on your video you can add slight background shading to the text by selecting the shading text background button