There is no free plan, and no trial. That belongs at the top, because the marketing around AI video has trained people to expect a sandbox before the card comes out, and here the card comes out first. King AI is a credit based subscription: Basic at $11.88 a month billed annually, Pro at $23.94, Ultra at $119.94. If the brief for the next project is "find something that costs nothing to test on a Sunday", this is the wrong tool, and no amount of prompt craft fixes a budget of zero.
Paid plans export at 1080p, without a watermark. There is no 4K export. For a feed, a marketplace listing, a landing page hero, or a client review cut, that is enough, and it is what most of the work actually needs. It is not enough for a broadcast master or a big screen, so decide the destination before the format.
A clip holds one idea: one camera move, one subject action, one light. A thirty second film is eight to twelve of those assembled in an editor, with sound built separately. Anyone who types a paragraph and expects a finished minute will be disappointed, and the disappointment is a planning error rather than a tool failure. The edit is still the edit.
Single subject, controlled light, simple movement: reliable, usually first or second attempt. Two people passing an object, a hand that has to grip correctly, a crowd that has to behave, fabric that folds on cue: often almost right, which is the expensive kind of wrong. Budget three or four attempts for those shots rather than one, and check hands and contact points first, because that is where the error usually lives.
Generation returns silent video. No dialogue, no effects, no lip sync. An audio cue can go into a brief as a pacing reference, and it helps, but it does not come back out as audio. Music, voice, and effects are added in an editor by a person who knows what they are doing, which is a separate skill and a separate budget line.
The tool is good at the things a stills shoot cannot do cheaply: product motion from an approved photo, a character who stays the same person across shots, first and last frame reveals, and three readings of one idea before lunch. It is not a replacement for a camera crew, a sound recordist, or an editor. The teams who get value from it arrive with a brief, a deadline, and an edit plan made before the first generation, treating the limits above as part of the brief rather than a surprise at delivery.
If that still sounds like the right fit for your next project, the tool is here: King AI.