Full HD or 4K for AI video: which should you choose?
Every BetterVideo video is created at 720p and enhanced to Full HD 1080p or 4K Ultra HD. Full HD costs half as much. Choose 4K when it will be shown large.
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.
The honest part
Both sizes are enhanced from a 720p original. Enhancement adds sharpness and cleans the picture. It cannot create detail that was never there, so 4K is crisper but not magic.
Choose Full HD for
- Phones and social feeds
- Quick drafts
- Anything you make often, since it costs half as much
Choose 4K for
- TVs, projectors and large monitors
- Footage you will crop or grade
- Client work that asks for 4K
A simple decision rule
If you are unsure, choose Full HD. You can make the same idea again in 4K later if you need it, and the Full HD version costs half as much. Choose 4K from the start only when you already know the video will be shown on a large display, or handed to a client who asked for it.
What it costs
| Video length | Script words | Full HD 1080p | 4K Ultra HD |
|---|---|---|---|
| Up to 5 seconds | up to 10 | 1 credit | 2 credits |
| 6–10 seconds | up to 20 | 2 credits | 4 credits |
| 10–15 seconds | up to 37 | 3 credits | 6 credits |
| 15–20 seconds | up to 50 | 4 credits | 8 credits |
Credit packs: Starter Pack $9 for 10 credits ($0.90 a credit) · Pro Pack $29 for 40 credits ($0.72 a credit) · Elite Pack $49 for 80 credits ($0.61 a credit). Credits never expire, and there is no subscription.
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
On a big screen, yes. On a phone most people cannot tell.
Upload a Full HD video to the enhancer to upscale it.
Yes. 4K files are larger.
Keep reading
- Full HD 1080pMake an AI video from a sentence and get it in Full HD 1080p, ready for social media, ads and websites. From 1 credit, no subscription.
- 4K Ultra HDGet your AI text to video clip in 4K Ultra HD. Created at 720p and enhanced to 3840 by 2160, from 2 credits. No subscription, credits never expire.
- Ai video cost?Every length and quality priced in credits, how script length sets the price, and what a credit pack gets you.
- AI video guidesPlain-English guides: how to write a prompt, add a voiceover, choose Full HD or 4K, make vertical video and more. Up to 20 seconds, no subscription.
- 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.
- Image to VideoTurn a photo into a moving video ad, or make the face in a photo speak. Music or voiceover, Full HD or 4K, up to 20 seconds. No subscription.
← Back to AI video guides
Ready to make your video?
Pick a pack, describe your video and download it in a few minutes.
No subscription required. Credits never expire.