AI Video Editor: Add Subtitles and Motion to a Talking Head

If you have a rough clip of yourself talking to the camera, you can turn it into a polished short-form video without leaving your browser. This guide shows you a complete workflow using video97, an online video editor with AI tools. You will add automatic subtitles, apply motion effects, mix in background music, and export a vertical MP4 ready for social media. The whole process takes about ten minutes once you understand the steps.

Set up your project and trim the clip

To start, open video97 in your browser and create a new project. Choose a vertical aspect ratio (9:16) for short-form videos for TikTok, Reels, or Shorts. Upload your talking-head clip by dragging it into the media panel, then add it to the timeline.

Now trim your clip. Select the clip in the timeline and move the playhead to the point where you want it to start. Set the start point, then move the playhead to the end and set the end point. If there is a mistake in the middle, use the split tool to cut it out, then delete the bad section. This is the cutting part of editing, and it is non-destructive. You can always adjust the trim points later.

Generate AI subtitles automatically

With your clip in place, go to the Subtitles tab and click the AI subtitles button. The AI will listen to the audio and transcribe it with timestamps. Depending on the length of your clip, this takes a few seconds.

Once the subtitles appear, review each line. The AI is not perfect, especially with unusual names or technical words. Click on a word or line to edit it. You can also adjust the timing by dragging the subtitle blocks on the timeline.

Next, customize the subtitle style. Choose a bold font for short-form video, set the size so it is readable on a phone, and pick a colour that contrasts with your video. Many creators use white text with a black outline or a semi-transparent background. You can also move the subtitles to a safe area so they are not covered by the platform interface. If you want to add subtitles to video quickly, this is the fastest method.

Turn the clip into a motion video

A static talking-head clip can feel flat. Motion effects bring it to life. Select your clip and open the Motion panel. There are presets like zoom in, zoom out, pan left, pan right, and subtle shake. Pick one that matches the energy of your content. For a calm explanation, use a slow zoom. For a high-energy promotion, try a fast pan or glitch effect.

You can also add motion to text overlays. Create a text layer with a headline or a callout, then apply an entrance animation such as slide, pop, or reveal. The motion makes the text feel integrated with the video, not pasted on.

If you want to go further, use the AI background generator to replace a plain wall with an animated gradient, a city street, or any other scene you describe in the prompt. The generator runs in the browser and creates a motion background that plays behind you or behind your text. This is one of the easiest ways to make a motion video without shooting a single extra frame.

Add a voice-over and background music

Your clip already has a voice, but you may want to redo it. In the audio section, click the microphone icon to record a voice-over directly in the browser. You can also upload a previously recorded file. Connect a decent microphone and reduce background noise for the best result.

For background music, browse the built-in music library. Filter by mood, genre, or duration. Drag a track onto a new audio layer below your voice track. Adjust the volume so the music supports the video without overpowering the narration.

If your editor has a feature like AI ducking or auto-duck, enable it. That feature lowers the music automatically whenever speech is detected. It saves you from manually adjusting the volume every time you cut or edit.

Review, edit, and export as MP4

Play the entire timeline from start to finish. Check for sync issues between the subtitles and speech. Make sure the motion effects start at the right moment and do not feel too fast or too slow. Listen to the audio mix once more.

Make any final trims or adjustments. Then click the Export button. Choose the resolution that matches your target platform: 1080x1920 for vertical shorts, 1920x1080 for YouTube or Vimeo. Select MP4 as the format and pick a quality preset. The export happens locally in your browser, so you are not waiting on a server queue. When it finishes, the download starts automatically.

Build a repeatable short-form workflow

If you publish short-form videos regularly, turn this process into a workflow. After you have customized your subtitle style and chosen a motion preset, save the project as a template. Next time, you only need to upload a new clip, run AI subtitles, apply the template, and export. This makes the browser-based pipeline faster than a traditional editing app, because you do not have to rebuild your layout every time.

Tips for better results with AI video editing

Keep your source video well-lit and the audio clear. This helps the AI subtitle generator be more accurate. Use a decent microphone or a quiet room if possible.

When you add motion, think about the pacing. A slow zoom works for educational content, while a glitch effect suits a trendy short. Do not apply too many effects to one clip. Subtle motion is almost always better.

Use subtitles not only as captions but also as part of your visual design. Choose a font and colour that match your brand. Keep each subtitle line under forty characters so they read quickly on a phone screen.

If you create videos in different languages, try generating subtitles in a second language after you finish the first pass. The AI can transcribe the same audio into another subtitle track, which you can then translate and style.

FAQ

Can I use video97 without downloading anything?

Yes, video97 is an online video editor that runs completely in your browser. You upload media, edit with AI tools, and export MP4 files without installing software.

How accurate are the AI subtitles?

The accuracy depends on audio clarity and pronunciation. For most talking-head videos with clear speech, the subtitles are accurate enough for publication. You can edit any word or line in the subtitle track before exporting, so small mistakes are easy to fix.

Does the motion video feature work for long videos?

Motion presets work on clips of any length, but they are most effective for short-form videos under two minutes. For longer videos, apply motion effects only to key sections or transitions to avoid a distracting result.