Veridive (https://veridive.com/) answers a question by searching live in YouTube videos with quotes from passages.

Veridive reads the subtitles of the videos found and returns a quoted response, with a link that starts the video at the moment the information is said.

DeepContext allows you to communicate with your own library: videos, channels, playlists or imported files, citing these sources.
DeepWatch creates agents that monitor a topic or channels and report what’s new.
A “simple” chatbot mode is also offered.

“Agents” turn a video into an infographic, presentation, report, mind map, review sheets, quizzes, etc.

Language models used not cited.

In free mode with accounts, 100 credits per day and 500 credits per month, all functions unlocked.

Source of video for testing: https://www.youtube.com/watch?v=ayYGaMh4y7Q