Conciseness

Lean throughout: no concept explanations (never explains what yt-dlp or ffmpeg are), every line is a command, flag, or decision rule (e.g., "Treat the first word passed by the user as $ACTION, remainder as the URL"). The only mild padding is "(default behavior is fine for most cases)", which is a borderline call — overall every token earns its place, matching anchor 5.

Actionability

Fully executable copy-paste commands with clearly marked placeholders ("<yt-dlp-download-folder>", "<url>"), covering the common cases: best quality, 1080p cap with "--merge-output-format mp4", format-by-id via "yt-dlp -F", playlists with "--playlist-items 1-5", audio extraction with format/quality options, cookies, and rate-limit flags. Matches anchor 5.

Workflow Clarity

Clear decision sequence (steps 1-3 with a fallback: "if $ACTION is empty or does not match an action, list the available actions") plus failure-mode recovery in the Access problems section (age-gated → "--cookies-from-browser", 429s → sleep flags). Not 5 because there is no explicit post-download verification checkpoint for batch (playlist) downloads, though "--continue --no-overwrites" partially covers batch interruption — a minor validation gap fitting anchor 4 rather than the batch cap of 3, since downloads are additive, not destructive.

Progressive Disclosure

A self-contained ~50-line skill with well-organized sections (Actions, Video, Audio, Access problems), no bundle files, no nested references, and a single well-placed external pointer (the yt-dlp supportedsites URL). Per the rubric's simple-skill guideline, this earns a 5 with just well-organized sections.

Specificity

"Download videos and audio from YouTube and 1000+ sites with yt-dlp" names two concrete actions (video download, audio download) that comprehensively cover the skill's entire scope; there are no gaps — playlist, quality, and format variants are body-level detail, not missing capabilities. Not 4 because anchor 4 requires "minor gaps in coverage", and the description covers everything the skill does.

Completeness

Explicitly answers both: what ("Download videos and audio from YouTube and 1000+ sites with yt-dlp") and when ("Use when the user mentions 'yt-dlp', 'youtube-dl', wants to download a video, or rip audio from a URL") with concrete trigger phrases — a textbook match for anchor 5.

Trigger Term Quality

Triggers include the tool names users actually say ("yt-dlp", "youtube-dl" — a true synonym/variant) plus natural phrases "wants to download a video" and "rip audio from a URL". Coverage of natural terms including synonyms is comprehensive, matching anchor 5; anchor 4 would require missing common phrases, and none of consequence are absent.

Distinctiveness Conflict Risk

A clear niche (media downloading via a named tool) with distinct triggers including the tool names themselves; no other plausible skill would fire on "yt-dlp" or "rip audio from a URL". Minimal conflict risk, matching anchor 5.