SubExtract for Students

Convert a 2-hour lecture into searchable notes

1. 1Paste the lecture's YouTube URL
2. 2Extract the full transcript
3. 3Save to your note-taking app (Notion, Obsidian, Apple Notes, etc.)
4. 4Now searchable for terms, formulas, or names without rewatching

Build a study guide from a video series

1. 1Use Playlist Videos to extract the playlist's full video list
2. 2Extract transcripts for each video in the playlist
3. 3Combine into a single document organized by playlist order
4. 4Annotate with your own notes — the source material is captured forever

Citing a tutorial in homework

1. 1Extract the tutorial's transcript
2. 2Quote the exact instruction or formula with its timestamp
3. 3Cite as: 'Creator Name, Video Title, YouTube, [date], [HH:MM:SS]'
4. 4Avoids the 'video is gone' problem — your citation is verifiable from the saved transcript

Searching across a semester's worth of lectures

Extract every lecture from your course's YouTube playlist, save as text files with the lecture date in the filename. Now `grep "derivative"` (or similar text search) finds every mention across the whole semester. Beats scrubbing through video timelines.

Building a personal flashcard deck

Extract a video tutorial's transcript, identify key terms and definitions, paste into Anki or your flashcard app of choice. The video becomes raw material for spaced-repetition study.