Most zombie couple videos in your feed share one sound. That sound is not inside the AI video: people add it in TikTok or Instagram when they post. This guide covers what audio your clip already has, when to keep it, and how to use the trend sound instead.
What sound does the video come with?
Every zombie couple video made here is a 15-second, 720p MP4 with sound generated together with the picture. Part one has cold, quiet ambience: wind, creaking wood, the room you picked as the opening scene. A soft piano runs underneath and turns warm at the match cut, when the video jumps from the zombie scene into the happy memories. There is no dialogue and no song with lyrics.
We do not put copyrighted music into the file. That keeps the MP4 clean for any platform: you can post it as it is, or replace the audio with whatever sound the app offers you.
Should you keep our sound or use the trend sound?
Both work. Pick by where you post and what you want people to feel.
- Use the trend sound when you want the clip to sit next to the thousands of others in the trend. On TikTok, the sound page groups every video that uses it, and viewers who tap the sound can find yours.
- Keep the built-in sound when you post somewhere without a trend sound, such as a group chat, a story for close friends, or a message to your partner. The piano is timed to the cut, so the emotional turn lands on the right frame.
- Mix both if the app lets you: keep our ambience low and put the trend sound on top. The cold-to-warm change then still comes through.
How do you add the trend sound on TikTok?
- Download your video from My videos or from the page where it finished rendering. The file is a plain MP4 without a watermark.
- Open TikTok, tap +, then Upload, and pick the MP4.
- Tap Add sound. Search for the trend by name, or open the sound from any zombie couple video you saved earlier: on that video, tap the spinning record at the bottom right, then Use this sound, and choose your upload.
- In Volume, turn Original sound down to 0 if you want only the trend sound, or to about 20 to 30 percent to keep a little of our ambience.
- Line the sound up so the strongest beat hits the match cut. In a 15-second clip from this site, the cut usually lands around the 9-second mark.
- Add your caption, tick the AI-generated content label where TikTok shows it, and post.
How do you add the trend sound on Instagram Reels?
- Download the MP4.
- In Instagram, tap +, then Reel, and select the video.
- Tap the music note, search for the sound, and pick the part of the track you want. Instagram lets you drag the start point.
- Tap Volume and lower the Camera audio (that is our built-in sound) if you only want the trend sound.
- Add the AI label under Advanced settings when Instagram asks, then share.
On both apps, the sound you save from another post is the fastest route. Search results for trend sounds change from day to day, and some regions see a different version first.
What about YouTube Shorts and other apps?
YouTube Shorts lets you add a sound from its own library when you upload from your phone; the same volume controls apply. Apps without a music library will play the built-in sound, which is why we ship the clip with audio instead of leaving it silent.
If you plan to post on YouTube Shorts, TikTok and Reels at the same time, pick 9:16 as the aspect ratio before you generate. The guide to scenes and aspect ratios explains when another ratio is the better choice.
Why does the cut matter so much for the sound?
The whole trend lives on one moment: the zombie lunges toward the open arms, and in that instant the video cuts from cold blue-grey light to warm golden light. A music change on that exact frame is what makes people replay the clip.
Our video is built around that moment. The zombie lunges, and the cut lands before they touch. Part two then shows three happy memories in three different places, both people human again, in new outfits in every shot. When you add a trend sound, try to keep its big change on the cut. If the sound has a slow intro, start it a few seconds in.
Do you need to edit the video at all?
No. The shots, the match cut, the light and the timing are already in the file. The sound is the only thing people usually change, and that happens inside the posting app. You do not need a separate editor, a prompt or any other software.
If you want a different opening, you can make another video with a different scene: the photos stay in the form, so it is one more click. Each video costs 100 credits. A single video is $6.99, three are $14.90 and ten are $39.90, one-time, with no subscription. There is no free tier, credits never expire, and a failed render puts its credits back automatically.
Frequently asked questions
Is the trend song included in the video file?
No. The file carries its own ambient sound and piano. The trend sound is added in TikTok or Reels when you post.
Can I post the video with no music at all?
Yes. Mute the original sound in the app, or keep it: the built-in audio is designed to work on its own.
Will adding a sound remove the AI label?
No. The label is a setting in the posting app. Please turn it on: the people in the video are real, but the video is AI-generated.
Where is the cut in my video?
Usually around 9 seconds into the 15. Watch for the jump from blue-grey light to golden light.
Can I use the same photos for another version?
Yes. Change the scene or the ratio and generate again. The memories are drawn fresh for every video, so each version ends differently.
Ready to make yours? Add your two photos and generate. For the best result, read which two photos work best and which opening scene and aspect ratio to pick.