Trim and captions with AI

About this tutorial

The quickest way to a clean video. Shorties cuts the pauses and the mistakes out of your takes and adds captions. Then you put in your title and ask AI where your B-roll should go.

What you'll learn

• Add your clips and pick Trim + captions
• Type your title over "Title goes here" and switch its look
• Ask Edit with AI to plan your B-roll
• Fill the B-roll spots with your own clips

Chapters

1. 1Add your clips
2. 2Pick Trim + captions
3. 3Put in your title
4. 4Plan your B-roll

Step by step

1. Start the edit

   Open Shorties and tap Edit a video. Tap the plus button and pick the video you filmed of yourself talking. Filmed in pieces? You can pick up to 20 clips. Tap Next.

   It asks How do you want to edit? Pick the middle one, Trim + captions.

   No clips yet? Tap Record a clip instead and film yourself. You get the same three choices when you're done.

2. Check what it cut

   Give it a few seconds. Shorties listens to your whole video, cuts the pauses, the ums and the sentences you started over, and writes captions for every word.

   Press play. Then tap the pen at the top to see your transcript. Everything that was cut is faded out.

   • Want something else gone? Tap the words, then Cut.
   • Cut something you wanted? Tap it, then Put back.
   • Tap the film icon to go back to your video.

3. Fix your sound

   Tap your clip on the timeline, then Audio, then Voice enhance. You get two sliders:

   • Voice makes you sound clearer and fuller.
   • Noise takes out background hum, like a fan or traffic.

   Start each one at about 10% and listen. Reset takes you back to your original sound. A small yellow dot under a tool means you changed something, and Undo works anytime.

4. Change your captions

   Tap a caption to select it. The row at the bottom has everything you can do with captions.

   • Style changes the look. TikTok Sans tends to do best because it looks native in the feed.
   • To change the size, drag the corners, or tap Move, switch to Zoom and set about 45%.
   • The Edit tab fixes a wrong word. Put your cursor where a long caption should break and tap Return to split it.

   Tap the menu at the top, then Safe zones, to see where TikTok and Instagram cover your video with buttons.

5. Add your title

   Tap Title goes here at the top and type your hook, the line that makes someone stop scrolling.

   Want a different look? With the title selected, tap Replace and pick a style from the grid. Each title is made of a few parts: tap a part's button to change its words, size or spot. Drag the title to move all the parts together.

6. Plan your B-roll

   B-roll is the extra footage that plays over you while you talk, like a shot of your coffee when you say “every morning.”

   Tap Edit with AI, then Plan my B-roll (1 credit). It reads what you said and drops cards on your timeline wherever B-roll would help. Each card tells you what to film.

7. Put your clips in

   Film those shots or find them in your camera roll. Tap a card, then Replace, and pick your clip. It fills that exact spot. Don't want a card? Tap it, then Delete.

8. Export

   Play it once from the start. Tap Export at the top. If any B-roll cards are still empty, it reminds you. Keep the default settings for Reels and TikTok, tap Export, then Download. It's in your camera roll, ready to post.

   Bonus: put a few pictures at the very start that match your topic. Tap Add, then Image, size it to fill the screen, and trim it to end when your hook ends.