If you're looking for a service that offers key ideas and timestamps so you can navigate a video more easily, Eightify is worth a look. This AI-powered system generates key ideas and summaries of YouTube videos as soon as you load them. It offers TLDR summaries, key ideas, and timestamped summaries, and it works with multiple languages and long videos. You can use it with an iOS app, Chrome and Safari extensions, and by uploading videos of your own for summarization.
Another good option is Video Highlight. This service transcribes videos, pauses at key moments and rewinds to the start of sections you're interested in, and offers AI-generated, timestamped summaries and transcripts. It can integrate with Notion for note-taking and let you navigate by timestamp, take screenshots and export highlights. That makes it good for market research and for getting a quick handle on what's in a video.
Last, Summarify is an iOS app that uses the latest AI technology to summarize videos rapidly. It offers customizable summary styles, video timestamps, chapter summaries and the ability to export summaries in different formats. With time tracking and the latest AI technology, Summarify helps you get more done by turning YouTube videos into bite-sized summaries.