What Is Runway AI? A Beginner's Guide to Using the AI Tool That Creates Videos from Text
機械翻訳 / Machine-translated
@aifriends
AI Friends(https://aifriends.jp)のクロスポスト公式アカウント。AIツールの紹介・使い方・できることを、中学生でもわかるやさしい日本語で届けます。
機械翻訳 / Machine-translated
@aifriends
AI Friends(https://aifriends.jp)のクロスポスト公式アカウント。AIツールの紹介・使い方・できることを、中学生でもわかるやさしい日本語で届けます。
This article takes a detailed look at the AI video generation tool "Runway."
Runway is an AI video generation tool developed by the American company Runway Research. Simply enter text or an image, and the AI automatically creates a video for you.
With traditional video editing software, filming and editing used to take a lot of time. With Runway, however, you can generate a video in just a few minutes — no specialized knowledge required.
As of April 2026, Runway offers its latest model, "Gen-4.5." This model has earned the top ranking in global evaluations and is capable of producing exceptionally high-quality videos.
It is being used across a wide range of contexts, including film production, advertising, and social media posts. The tool has won the support of a broad user base, from individual creators to large companies.
Runway offers many features that make video production easier. Here, we introduce five particularly useful ones.
Enter a sentence like "a dog running under a blue sky," and the AI automatically generates a video matching that description. You can create videos up to 60 seconds long, making it ideal for short-form content.
Upload a still image (a photo or illustration), and Runway will turn it into a moving video. For example, you can add drifting clouds or flowing water to a landscape photo.
You can specify in detail how the camera moves within a video. Cinematic techniques such as zoom-in, panning (horizontal movement), and tilting (vertical movement) are all possible.
Record your own facial expressions with a webcam, and they will be reflected onto an AI character or 3D model. Since movements can be transferred in real time, this feature is convenient for creating avatar videos.
Simply give instructions in text, and the AI will automatically handle video cutting and BGM synchronization. This feature dramatically reduces the manual work that editing traditionally requires.
Here is a five-step guide to the basics of Runway, designed so that even beginners can get started with ease.
Visit the official Runway website (runwayml.com) and create an account using your email address. A free plan is available, so you can try it out right away.
The free plan has some feature limitations, but basic video generation is possible. If you want to use Runway seriously, the Standard Plan at $12 per month is recommended.
From the dashboard, select "New Project" to begin generating a video. You can choose whether to create from text or from an image.
Type in a description of the video you want to create. Writing specifically about the scene, movement, and camera angle — for example, "a person walking along a beach at dusk, camera following from behind" — will yield better results.
Click the "Generate" button and the AI will create your video. It completes in anywhere from a few seconds to several tens of seconds, so you can preview it and download it when ready.
Here is an honest look at the advantages and disadvantages of using Runway.
Runway is especially recommended for the following types of people:
On the other hand, those who insist on entirely original filmed footage, or who want to edit every detail meticulously, may find that traditional video editing software better suits their needs.
Runway AI is a groundbreaking tool that makes it easy to generate videos from text and images. Here are the key takeaways from this article:
Runway AI dramatically lowers the barrier to video production and is set to become an indispensable tool for the modern era. Start by trying the free plan and experience its possibilities for yourself.
This article is a cross-post from AI Friends.