This ‘Send To’ button will open up a row of options near the bottom of the screen, one of which will be the option to ‘Stitch.’. Once this feature is tapped on, the user can select a maximum of five seconds they want to include from the original clip. All that's then left to do then is record the video they want to add to the cropped. Here's how you can add a picture to your TikTok video. Open the TikTok app and start creating a new video. At the bottom right corner, select Upload. After you select the video clips that you want to add, switch to the Photos tab to add pictures into the mix. When you're finished, select Next.