How to Choose an AI Video Generator
Try it: write the same three-shot scene, two named characters in one room, into every generator you are considering. Compare the second and third shots against the first, not the first against the others.
1. How long can a finished video be?
Ask for the longest finished video, not the longest clip. Most models make a clip of a few seconds to half a minute. A longer video is clips joined, so the real question is what holds the joined clips together (question 2). SceneMixer makes segments of 15 or 30 seconds and joins them into an episode; a series is as long as the script. 15 or 30 second segments.
2. Do the characters stay the same?
This is the question that separates tools most. Test it: generate three shots with the same two people and check the faces, the clothes and the room in shots 2 and 3. SceneMixer reads the script once into a cast, locations and props that are fixed before any video is made, and every shot uses them. Why a whole series stays consistent.
3. Is the sound made with the picture?
Some tools make silent clips and leave voices to a second tool. Check whether the lines you write are spoken in the video, by which voice, and in which languages. In SceneMixer dialogue is spoken inside the video itself, one voice per character, in any of 15 languages, and each episode is scored for you. Dialogue and sound in one generation.
4. What formats and quality do you get?
Look for vertical and landscape, and the actual resolution of the file you download, not the best resolution on the pricing page. SceneMixer makes 9:16 or 16:9, from 480P up to 1080P, with a 2K tier on some models. Which quality tier.
5. Can you fix one shot?
Every tool makes a bad shot sometimes. What matters is the cost of fixing it: does it mean generating the whole video again? In SceneMixer you edit the shot’s text, which is free, and regenerate that one segment; the earlier take is kept. Fixing one shot without redoing everything.
6. What do you pay, and when do you find out?
Check the unit (per second, per clip, per credit), whether the price is shown before you press the button, and what a failed attempt costs. SceneMixer charges per second, shows the price on the button, and refunds a segment that fails. On the default tier video is 10 credits a second, and a 60-second episode is about 660 credits before retakes. Where credits go in one episode.
7. What can you do with the file?
Check whether you can download the original-quality file, whether a badge or watermark is added and who can remove it, and what a shared link carries. In SceneMixer a free account’s videos carry a small badge, members can turn it off, and a shared link always carries it. AI video without a watermark.
A ten-minute test for any tool
- Write a three-shot scene with two named characters in one room, and one line of dialogue.
- Generate it. Open shots 2 and 3 and compare them with shot 1: same faces, same clothes, same room?
- Is the line spoken in the video, in the voice and language you wanted?
- Change one line in shot 2 and make only that shot again. Did the others stay as they were, and what did it cost?
- Download the file. What size, what shape, what mark in the corner?
Red flags
- A price you only learn after you press the button.
- “Unlimited” with no mention of what limits the speed or the quality. Why unlimited AI video plans disappeared.
- Samples that are all single clips of a few seconds, with no finished episode.
- No way to see the cast or the script before the video is made.
Make it in SceneMixer, start to finish
- Script: paste your own on Upload Script, or write the brief above in AI Create and let it draft the episodes.
- Step 1: Type Short Drama; Scene Style Neon Nights, Urban Opulence; Costume Style Smart Casual, Streetwear; Visual Style Digital HD, Soft Glow; Target Region; dialogue language; 9:16 Portrait. Then read the script.
- Step 2: the two leads with one mark each and a voice; the stairwell and the balcony as locations; the letter as a prop. The first 15 setup images on an account are free.
- Storyboard: generate episode 1 first (free on your first drama) and read it before you render anything. One place per segment.
- Video: render on the default tier at 10 credits a second, fix single shots instead of whole episodes, then put the episode together and post.
| Question | Why it matters | SceneMixer |
|---|---|---|
| 1. Length of a finished video | Clips are short; a long video is clips joined | Segments of 15 or 30 seconds joined into episodes; a series is as long as the script |
| 2. Same characters | The hardest thing to get right | One cast, locations and props fixed before video is made |
| 3. Sound with the picture | Silent clips need a second tool | Spoken dialogue inside the video, 15 languages, scored music |
| 4. Formats and quality | What you can post where | 9:16 or 16:9; 480P to 1080P, 2K on some models |
| 5. Fixing one shot | The cost of every miss | Edit the text (free), regenerate one segment |
| 6. Price and when you learn it | Surprise bills | Per second, shown on the button, refunded on failure |
| 7. The file | What you can do with it | Original-quality download; badge off for members; shared links carry it |
FAQ
How do I choose an AI video generator?
Ask seven questions: length of a finished video, whether characters stay the same, sound, formats and quality, fixing one shot, price and when you learn it, and what you can do with the file.
Which AI video generator is best?
That depends on what you are making. This page does not rank tools; it gives you the questions and a ten-minute test to compare any of them, ours included.
How do I test whether characters stay the same?
Generate three shots with the same two named characters in one room and compare shots 2 and 3 against shot 1: faces, clothes and room.
Why does the price unit matter?
Per second, per clip and per credit are not comparable until you know what a finished minute costs, including failed attempts and retakes.
Do AI video generators add a watermark?
Many add a mark on free plans. In SceneMixer a small AI badge is on by default for free accounts, members can turn it off and shared links always carry it.
Can I fix one shot without regenerating the whole video?
In SceneMixer, yes: edit the shot's text and regenerate that one segment. Check this in any tool you try.
What is a good first project to test with?
A one-minute scene with two named characters, one room and one line of dialogue. It exposes consistency, sound and price in ten minutes.
Does SceneMixer pass all seven?
The table above says what it does on each. The ten-minute test is the way to check that for yourself.
Run the ten-minute test here
Three shots, two characters, one room, and a price on every button.
Updated November 3, 2026