ytdl — browser-native YouTube downloader

A thin browser-harness-js heredoc, exactly like gsearch/xsearch. There is no Bun program, no vendored solver, no HTTP client impersonation. Every hard thing YouTube does to play a video — cookies, poToken, the n-signature, the SABR multiplex, adaptive-bitrate selection — the page already does for playback. ytdl just records the result.

ytdl "https://www.youtube.com/watch?v=..."            # best quality → ~/Downloads
ytdl "https://www.youtube.com/shorts/<id>"            # Shorts — normalized to watch?v=
ytdl "https://www.youtube.com/watch?v=..." -q 360p    # 360p
ytdl "https://www.youtube.com/watch?v=..." -q 1080p   # 1080p (ffmpeg mux)
ytdl "https://www.youtube.com/watch?v=..." -q audio   # audio only
ytdl "https://www.youtube.com/watch?v=..." --info      # title / duration / qualities
ytdl "https://www.youtube.com/watch?v=..." -o Name -d ~/Videos

Quality targets