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For dynamic videos that swap in multiple variables cleanly, record so replacements have room to land: pause slightly after each word you plan to replace, face the camera with steady posture, keep the background and lighting stable, speak clearly, and keep the video under a minute. These habits give the system clean boundaries for accurate lip-sync.

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Key takeaways

  • Pause slightly after any word you plan to replace so there’s a clean audio boundary for a seamless swap.
  • Face the camera, keep steady posture, and use good front-facing lighting to improve lip-sync accuracy.
  • Keep videos under 1 minute for best speed and reliability; the maximum allowed length is 2 minutes.
  • Avoid putting proper nouns in the same sentence as a variable, and leave a placeholder roughly as long as the word you’ll replace.

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What to do and what not to do when creating a Dynamic Video for Multiple Variables:

  1. Pause slightly after the replacement word: Briefly pause after saying the word that you may want to replace. This creates a clean audio boundary, making the replacement seamless. (It doesn’t have to be an unnatural pause)
  2. Minimize sudden movements: Avoid moving abruptly, turning your head quickly, or shifting the camera during the beginning and end of the target word. Smooth and steady posture improves lip-sync accuracy.
  3. Face the camera: Looking directly into the camera produces better lip alignment.
  4. Keep the background stable: A static background enhances realism. Moving backgrounds (cars, people, shaky footage) can reduce quality.
  5. Ensure audio is present: Silent videos cannot be processed. Speak clearly and avoid heavy background noise.
  6. Video length: Keep videos under 1 minute for best processing speed and reliability (Max length allowed: 2 minutes)
  7. Lighting: Use good lighting on your face to improve lip-sync precision. Natural or front-facing light works best.
  8. Maintain consistency: Use the same tone, speed, and pauses in your recording to improve alignment when replacements are made.
  9. Pause between sentences should be balanced: not too short (to avoid linking them together) and not too long (to prevent unexpected effects).
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Other elements to keep in mind

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Mispronunciation of Proper Nouns:

When writing scripts, try to use relatively short sentences. The system depends on sentence boundaries when dynamically replacing variables, so the placement of proper nouns matters. In particular, avoid putting proper nouns in the same sentence as variables—this can lower the accuracy of the replacement and lead to mispronunciations.
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​Bad Practice:
​*“Hi, there. My name is Gracie and I noticed that your team over at your company is already using Restream. That’s great news. My job is to help you learn a little bit more about the tool. I’d love to meet and spend a few minutes walking through all of our capabilities and just chatting through all of our options with you. So feel free to book some time with me and can’t wait to chat.”*
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At first glance, the phrase “Hi, there” may look like a standalone sentence. However, very short phrases (under ~20 characters) often get automatically merged with the following sentence during generation. That means the final rendered phrase could be:
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​*“Hi, watermelon. My name is Gracie and I noticed that your team over at your company is already using Restream.”*
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In this scenario, the variable “there” is embedded within a longer sentence that includes proper nouns. This increases the chance of pronunciation errors or transcription mistakes, since the system may not handle the proper noun as intended.
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​Best practice:
Keep the placeholder variable in a self-contained phrase that flows naturally, but is long enough to stand alone. For example:
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  • Placeholder phrase: “Hi, watermelon, I hope you’re doing well.”
  • Next phrase: “My name is Gracie and I noticed that your team over at your company is already using Restream. That’s great news. My job is to help you learn a little bit more about the tool. I’d love to meet and spend a few minutes walking through all of our capabilities and just chatting through all of our options with you. So feel free to book some time with me—I can’t wait to chat.”
This approach ensures proper nouns are pronounced correctly, while still keeping the message natural and engaging.
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Video fully generated without retaining real parts

Make sure to pause long enough between sentences. This allows us to seamlessly merge scenes where we clone dynamic words with those where your original recording remains intact.
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​Word Replacement When recording speech, it’s important to leave a placeholder with roughly the same length as the word or phrase you plan to replace later. This helps maintain natural timing and pacing in the generated video.
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For example:
  • If you record “Hi, watermelon…” but later replace “watermelon” with a full name plus surname, the replacement will sound rushed or unnatural because the original placeholder was too short.
  • A better approach would be to record something like “Hi, watermelon watermelon…” or any two placeholder words. This gives enough space for the replacement name, making the final video sound smoother and more natural.

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Frequently asked questions

Keep videos under 1 minute for the best processing speed and reliability. The maximum length allowed is 2 minutes.
A brief pause after the replacement word creates a clean audio boundary, which lets the system swap in the new word seamlessly. It doesn’t have to be an unnatural pause.
The system relies on sentence boundaries when replacing variables. When a proper noun sits in the same sentence as a variable, it raises the chance of mispronunciation or transcription errors. Keep the placeholder variable in its own short, self-contained phrase instead.
Leaving a placeholder roughly as long as the final word or phrase keeps the timing and pacing natural. If the placeholder is too short (for example a single word being replaced by a full name and surname), the replacement can sound rushed. Recording two placeholder words gives the replacement enough room.
No. Silent videos cannot be processed. Make sure audio is present, speak clearly, and avoid heavy background noise.
Updated July 2026.