Decision Tree

Want to download...	Tool / Approach
YouTube / social media video	`scripts/dl-video.sh URL` (auto-detects Bilibili cookies)
Audio from any video URL	`scripts/dl-audio.sh URL`
Spotify playlist/album/track	`spotdl URL`
Images from gallery/artist page	`scripts/dl-gallery.sh URL`
A direct file URL (fast)	`scripts/dl-file.sh URL` (aria2, 16 connections)
A torrent or magnet link	`scripts/dl-torrent.sh "magnet:..."`
Subtitles for a video	`scripts/dl-subtitle.sh QUERY`
An ebook or paper	→ references/ebooks.md
A movie or TV show	→ references/video.md
Music / game soundtracks / OST	→ references/music.md
Software or app	→ references/software.md
Stock images/video/audio/fonts	→ references/media-assets.md
Chinese cloud drive resources	→ references/cloud-search.md
Online courses	→ references/education.md
Something else / not sure	→ references/search-techniques.md

Scripts

All in scripts/. Each does one thing. Compose as needed.

Script	What it does	Key args
`install-toolkit.sh`	Install all CLI tools	—
`dl-video.sh URL [QUALITY]`	Download video (auto cookies for Bilibili)	`best`/`1080`/`720`/`480`
`dl-audio.sh URL [FORMAT]`	Extract audio	`mp3`/`opus`/`flac`/`best`
`dl-file.sh URL [OUTPUT]`	Fast multi-thread download	16 connections via aria2
`dl-gallery.sh URL [DIR] [ARGS...]`	Batch download images	extra args passed to gallery-dl
`dl-torrent.sh MAGNET [DIR]`	Download torrent/magnet	via aria2
`dl-subtitle.sh QUERY [LANG]`	Search & download subtitles	`en`/`zh`/`ja` etc.

Quick One-Liners

# Best quality video
yt-dlp -f "bv*+ba/b" "URL"

# 1080p video + subtitles
yt-dlp -f "bv[height<=1080]+ba/b" --write-subs --sub-langs "en,zh" "URL"

# Extract audio as MP3
yt-dlp -x --audio-format mp3 "URL"

# Download YouTube playlist
yt-dlp --yes-playlist "URL"

# Fast file download (16 connections)
aria2c -x16 -s16 -k1M "URL"

# Download magnet
aria2c --seed-time=0 "magnet:?xt=..."

# Batch images from gallery
gallery-dl "URL"

# Spotify album → local MP3s
spotdl "SPOTIFY_URL"

# All PDFs from a page
wget -r -l1 -A "*.pdf" "URL"

# Video metadata as JSON (automation)
yt-dlp -j "URL"

# Get direct URL without downloading
yt-dlp -g "URL"

Agent Automation Patterns

Video pipeline: yt-dlp -j URL → parse JSON → select format → yt-dlp -f FORMAT URL -o OUTPUT

Ebook search: Search Anna's Archive / Z-Library / 鸠摩搜书 → get download page → extract link → aria2c

Bulk media: gallery-dl --dump-json URL → review items → gallery-dl -d OUTPUT URL

Music: spotdl SPOTIFY_URL (auto YouTube match + metadata) or yt-dlp -x --audio-format mp3 YOUTUBE_URL

Domain Instability

Many resource sites rotate domains. When a URL fails:

Search: [site name] mirror 2026 or [站名] 最新地址
Check Reddit/Twitter for community mirror lists
Anna's Archive = most resilient ebook meta-search
For Chinese cloud search: check 网盘之家导航 for latest links

References

File	Content
ebooks.md	Ebook sites, academic papers, audiobooks, manga, Chinese books
video.md	Torrent sites, DDL, subtitles, anime, Chinese video
music.md	Free music, download tools, Chinese music, podcasts
software.md	Software archives, package managers, Chinese sites
media-assets.md	Stock images, video, audio, fonts
cloud-search.md	Chinese cloud drive search (百度/阿里/夸克)
education.md	Free courses and MOOCs
tools-reference.md	Detailed CLI syntax and advanced flags
search-techniques.md	Google dorks, search strategies

Tool	Install	Purpose
`yt-dlp`	`brew install yt-dlp`	Video/audio from 1800+ sites
`aria2c`	`brew install aria2`	Multi-thread downloads, torrents
`gallery-dl`	`pip3 install gallery-dl`	Batch image/media, 170+ sites
`spotdl`	`pip3 install spotdl`	Spotify playlists → local files
`wget`	`brew install wget`	Recursive downloads, site mirroring
`curl`	pre-installed	HTTP requests, API calls

download-anything

Download Anything

Toolkit