Fetching video with yt-dlp

@hypit/yt-dlp owns video download and its CLI contribution for the Hypit Distribution:

hypit download prepare
hypit download "https://example.com/watch?v=VIDEO_ID" --to references/source.mp4

The CLI creates destination directories, refuses existing output paths and probes the completed file. Add --json for the source URL, saved path and media properties. This operation opens no Runtime Profile and creates no Build.

Package boundary

• isVideoUrl(value) recognizes HTTP and HTTPS links. Local paths, including Windows drive paths, remain file inputs.
• downloadVideo(url, target) downloads one video to the given path. Its caller owns destination preparation and overwrite policy. The target extension must be .mp4, .mkv, .webm or .mov.

The downloader reads the locked runtime/pyproject.toml and runtime/uv.lock shipped by this same package. prepareVideoDownload() (download prepare) explicitly runs uv sync --frozen into <hostState>/programs/yt-dlp/<version>/.venv. downloadVideo() only invokes that prepared executable and refuses a missing environment. The caller's location and a repository services/ ancestor are irrelevant. uv is needed for preparation; ffmpeg must be on PATH for fetching, and the CLI uses ffprobe to report the saved media. The default upstream extras include the EJS solver in that locked environment. Fetch explicitly selects the calling Node executable, ignores user yt-dlp configuration/plugins, and disables updates and remote component acquisition. Fetching source media remains a network operation.

The request selects bv*+ba/b, with res:1080,vcodec:h264 format preferences and --no-playlist. Available source streams determine the result. It stages the download in the OS temporary directory, then moves the completed file to the target, copying on a cross-volume EXDEV error. Temporary files are removed when the operation ends. Download errors retain the tool's diagnostic output.

The package supplies download behavior, locked material, command arguments and reporting. It uses media-local to inspect the finished ordinary file and owns network acquisition itself. Production use is described in the Hypit Skill's Downloading a video from a link page. runtime/README.md covers direct invocation when a source needs additional yt-dlp options.