AI Video Tools: What to Use and When
You don't need a shelf of tools — you need the right one for each layer of the job. AI video posts are built from four layers: the generated clip, the edit, the audio, and the platform it lands on. This guide explains each category, what it's good at, and where it fails — without rating tools we haven't tested.
Image-to-video generators
Animate a still photo into a short clip. This is the core tool behind photo-to-video formats: one image in, a few seconds of motion out.
Use it when
When your format starts from a photo of a person, pet or character — performer clips, transformations, reaction memes.
Watch out for
- Most output is silent — audio is a separate step
- Hands, text and fine patterns are common failure points
- Identity drift: the subject can change slightly across generations
Examples in this category
Text-to-video generators
Generate clips from a written prompt, no source photo needed. Best for cinematic or imaginative shots where a real reference doesn't exist.
Use it when
Cinematic b-roll, establishing shots, surreal scenes — anything where 'close to the photo' is not the goal.
Watch out for
- Prompt adherence varies a lot between models and versions
- Legible on-screen text and recognizable faces are still unreliable
- Iterating is slow — change one variable per attempt
Examples in this category
Editors for stitching and pacing
Assemble generated clips into a finished post: trim, speed-ramp, transition, caption, sync to a track.
Use it when
Always. Generators produce ingredients; the post is made in the editor.
Watch out for
- Platform re-compression can wash out subtle gradients — check the exported file
- Captions added in the platform editor keep the video readable on mute
Examples in this category
Audio and voice tools
Add the layer that carries timing: music, voiceover, or a merged audio track for clips that render silent.
Use it when
Performance formats need the reference audio kept; cinematic clips need sound design; every post needs the beat marked.
Watch out for
- Commercial music availability differs per platform and region
- Voice cloning has real consent and disclosure obligations — only use voices you have the rights to
Examples in this category
How to choose
- 1Start from the format, not the tool: pick the effect you want, then the tool category it needs.
- 2One tool per layer: a generator for the clip, an editor for the cut, the platform for the audio.
- 3Verify claims against the tool's own docs — capabilities, lengths and prices change monthly.
- 4Free tiers are fine for learning a workflow; rendering at posting quality usually costs something somewhere.