Youtube

YouTube search & transcripts

One CLI covers everything: yt-dlp, run via uvx (no install, no API key). It handles both search/metadata and transcripts. Keeping it current avoids most extraction breakage, so prefer uvx yt-dlp@latest if you hit errors.

Typical flow: search for a query or channel -> pick the relevant video(s) -> pull the transcript -> answer/summarize. When the user cares about a specific point, open the video at that timestamp in their browser.

If a flag here doesn't behave as expected, run uvx yt-dlp --help to self-correct.

1. Search

Keyword search, one line per result (id | title | channel | duration_seconds):

uvx yt-dlp --print "%(id)s | %(title)s | %(channel)s | %(duration)s" \
  --flat-playlist "ytsearch10:YOUR QUERY HERE"

• Change ytsearch10: to ytsearchN: for N results. Use ytsearchdate10: to sort by newest instead of relevance.
• Want full structured data (descriptions, view counts, etc.)? Use --dump-json instead of --print (drop --flat-playlist to enrich each result at the cost of one request per video).
• Add more fields to --print as needed: %(view_count)s, %(upload_date)s, %(channel_id)s.

Enumerate a known channel's recent uploads (point at the channel's /videos URL):

uvx yt-dlp --print "%(id)s | %(title)s | %(upload_date)s" --flat-playlist \
  --playlist-end 20 "https://www.youtube.com/@CHANNELHANDLE/videos"

A video URL is just https://youtu.be/VIDEO_ID or https://www.youtube.com/watch?v=VIDEO_ID.

2. Transcripts

Fetch captions in the srv1 format. It is clean (one segment per phrase, no rolling-duplicate lines) and small. Write it to a temp file, then parse. Never read the raw .srv1 into context — always run it through one of the parsers below.

uvx yt-dlp --write-auto-sub --sub-lang en --sub-format srv1 --skip-download \
  -o "%(id)s.%(ext)s" -P /tmp "https://youtu.be/VIDEO_ID"

• --sub-lang en de tries en, then de. For non-English audio, most videos still expose auto en; you can also --write-sub (manual subs) in addition to --write-auto-sub.
• The file lands at /tmp/VIDEO_ID.<lang>.srv1 (yt-dlp always appends the language). The globs below handle the language suffix for you.
• See what's available first: uvx yt-dlp --list-subs "https://youtu.be/VIDEO_ID".

Default: clean plain text (no timestamps)

This is what you usually feed to yourself to read/summarize. Timestamps are dropped, so it is the most context-efficient form.

uv run python -c "
import glob, html, re
x = open(glob.glob('/tmp/VIDEO_ID.*.srv1')[0]).read()
print(' '.join(html.unescape(html.unescape(t)).strip()
               for t in re.findall(r'<text[^>]*>(.*?)</text>', x, re.S)))
"

Timestamped (to locate when/if something is discussed)

Use this only when the user asks "when does the video talk about X" or "does it ever cover Y" — it costs more context. Output is m:ss | text per line:

uv run python -c "
import glob, html, re
x = open(glob.glob('/tmp/VIDEO_ID.*.srv1')[0]).read()
for m in re.finditer(r'<text start=\"([\d.]+)\"[^>]*>(.*?)</text>', x, re.S):
    s = int(float(m.group(1)))
    print(f'{s//60}:{s%60:02d} | {html.unescape(html.unescape(m.group(2))).strip()}')
"

Scan the lines for the relevant text and report the moment to the user.

3. Jump to a moment in the browser

When the user wants to go to a specific point (not just be told the timestamp), open the video at that second in their default browser. YouTube honors ?t=SECONDS (or &t=SECONDS on watch?v= URLs):

open "https://youtu.be/VIDEO_ID?t=754"          # jumps to 12:34

Only do this when the user clearly wants to navigate there; otherwise just tell them the timestamp.

Notes & troubleshooting

• No API key needed. The official YouTube Data API is not used (it can't return transcripts of arbitrary videos and caps search at ~100/day).
• IP blocking / rate limits: yt-dlp relies on unofficial access and can be throttled on datacenter/cloud IPs. From a normal machine it's reliable. Fetch gently (avoid hammering many videos in parallel); if you hit "too many requests" or extraction errors, retry with uvx yt-dlp@latest .... yt-dlp also supports cookies/proxies (see --help).
• Other caption formats: srv1 is the cleanest for text. json3 carries the same data as JSON if you prefer parsing that; the default srt/vtt auto-caption output has rolling duplicate lines and is best avoided.
• For long transcripts, read the saved/piped output rather than dumping the whole thing into the conversation.