AI video prompts for sci-fi worlds
AI video prompts for sci-fi worlds: stations, cities and starlight, up to 20 seconds, Full HD or 4K.
No subscription · Credits never expire · From $9
- Up to 20 secondsone continuous clip
- Built-in voiceoverup to 20 s, 50 words
- Talking photolip-sync, 4 or 8 s
- Full HD or 4Kenhanced automatically
BetterVideo at a glance
BetterVideo (bettervideo.io) is an AI video platform. It makes short videos from a sentence (text to video) or a photo (image to video), adds built-in music or a voiceover, and delivers them in Full HD 1080p or 4K Ultra HD. It also enhances and upscales videos made in other tools. Credits are sold in packs from $9, never expire, and there is no subscription.
- Maximum clip length
- 20 seconds, for both text to video and image to video
- Built-in voiceover
- Up to 50 words, up to 20 seconds, with a male or female voice
- Lip-sync (Talking photo)
- 4 or 8 seconds, about 20 words, from a photo with a clear face
- Music
- 10 AI-generated styles; one sound (music or voiceover) per video
- Resolution
- Full HD 1080p or 4K Ultra HD, enhanced from a 720p original
- Shapes
- Vertical 9:16 or horizontal 16:9
- Enhancement
- Included in every Create video; a separate enhancer upgrades any video up to 5 minutes
- Pricing
- Credit packs from $9, no subscription, credits never expire
Facts checked 2026-10-01.
What makes a good sci-fi worlds prompt
Sci-fi prompts need scale and glow. Describe the structure, the light colours and a slow, wide camera move.
Prompts to copy and change
- A white space station orbiting a blue planet with sunlight glinting, slow pan
- A neon megacity with flying vehicles in the distance at dusk, camera gliding
- A research lab with glowing screens and a figure in silhouette, slow push-in
- A long metal corridor with pulsing lights, camera moving forward
- A spaceship leaving a launchpad at dawn with steam and light, wide shot
- A desert planet with two suns setting over dunes, slow rising
Add a voiceover to your sci-fi worlds video
Switch Sound to Voiceover and paste a script. Each example below shows what it would cost.
- "The signal came from beyond the last star. We answered." That script is 10 words, so the video falls in the "Up to 5 seconds" length and costs 1 credit in Full HD or 2 credits in 4K.
- "In the year twenty two hundred, the city rose above the clouds. This is where our story begins." That script is 18 words, so the video falls in the "6–10 seconds" length and costs 2 credits in Full HD or 4 credits in 4K.
Tips
- Name the colour of the lights
- Use wide shots for scale
- Cinematic or Dramatic music
Already have a video, even one made in another tool?
Sharpen it and upscale it to Full HD or 4K with the same credits. See how to upscale an AI video to 4K → or enhance a video now →
Frequently Asked Questions
Use original descriptions.
Horizontal 16:9 for trailers.
Keep reading
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- Prompt that worksA simple formula for AI video prompts: subject, setting, light and camera move, with examples and the mistakes to avoid.
- Text to VideoType a sentence and get a finished video with music or a voiceover, up to 20 seconds, in Full HD or 4K. Pay as you go. Credits never expire.
← Back to AI video prompt library
Ready to make your video?
Pick a pack, describe your video and download it in a few minutes.
No subscription required. Credits never expire.