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<h1 id="downloading"><a class="header" href="#downloading">Downloading</a></h1>
<h2 id="starting-a-download"><a class="header" href="#starting-a-download">Starting a download</a></h2>
<p>Paste any supported URL into the download bar (desktop) or the ⬇
Downloads modal (web). yt-offline classifies the URL by platform, routes
it to the right folder, and starts yt-dlp. A channel/playlist URL pulls
the whole thing; a single-video URL pulls just that one.</p>
<p><strong>Quality picker:</strong> Best / 1080p / 720p / 480p / 360p, or <strong>Music mode</strong>
for audio-only extraction into <code>music/&lt;artist&gt;/</code>.</p>
<p><strong>Fast mode</strong> stops at the first already-downloaded video (quick routine
re-checks). Turn it off for a full gap-filling scan.</p>
<h2 id="per-channel-options"><a class="header" href="#per-channel-options">Per-channel options</a></h2>
<p>Right-click a channel (or use the ⚙ on its sidebar row) for overrides
that apply to scheduled re-checks and the “Check for new videos” action:</p>
<ul>
<li>Quality cap, audio-only, bandwidth cap, min/max file size, date cutoff.</li>
<li>A free-form <code>--match-filter</code> (e.g. <code>duration &gt; 60 &amp; view_count &gt; 100</code>).</li>
<li>Subtitle overrides, YouTube player-client override, post-download
convert mode — each defaulting to the global setting.</li>
<li><strong>Skip auth check</strong> — silences yt-dlps “playlists that require
authentication” warning for <strong>public</strong> channels (see
<a href="./troubleshooting.html#the-youtubetab-authentication-warning">Troubleshooting</a>).</li>
</ul>
<p>Per-channel options ride along in library backup/restore.</p>
<h2 id="subtitles"><a class="header" href="#subtitles">Subtitles</a></h2>
<p>Global defaults (Settings → Subtitles) + per-channel overrides control:
download on/off, auto-generated captions, embedding into the container,
language filter, and format conversion (<code>srt</code> is the most
Plex/player-compatible). Subtitles are written as sidecar files and
optionally embedded.</p>
<h2 id="format-conversion"><a class="header" href="#format-conversion">Format conversion</a></h2>
<p>A post-download ffmpeg pass (Settings → Format conversion, or per
channel):</p>
<ul>
<li><strong>Remux → mp4</strong> — instant container change, no re-encode (device/Plex
compatibility).</li>
<li><strong>Re-encode → H.264 mp4</strong> — shrink large 4K files at a chosen CRF +
x264 preset.</li>
<li><strong>Extract audio</strong> — mp3 / m4a / opus / flac.</li>
</ul>
<p>It runs as a distinct transcode job after the download. <strong>Keep original</strong>
preserves <code>&lt;name&gt;.original.&lt;ext&gt;</code> alongside the converted file; otherwise
the source is removed once the convert succeeds.</p>
<h2 id="resilience"><a class="header" href="#resilience">Resilience</a></h2>
<p>Downloads are hardened against YouTubes flakiness automatically:</p>
<ul>
<li><strong>Retry + backoff</strong> on connection resets (<code>--retries 30</code>, linear
retry-sleep).</li>
<li><strong>Jittered throttle</strong> between videos so a long channel scan doesnt
look robotic and trip the captcha wall.</li>
<li><strong>Auto-retry</strong> of transient (rate-limit / network / captcha) failures
after a cooldown, with adaptive slow-down for the rest of the batch.</li>
<li><strong>Hang watchdog</strong> kills a job that produces no output for 5 minutes (a
wedged request) and re-queues it.</li>
</ul>
<p>Failures are classified and shown with a one-line suggested fix — see
<a href="./troubleshooting.html">Troubleshooting</a>.</p>
<h2 id="scheduler"><a class="header" href="#scheduler">Scheduler</a></h2>
<p>Enable it (Settings → Auto-check channels) to re-check every channel for
new uploads on an interval. Each channel uses its own stored options.
Theres also a per-folder “Check all” action.</p>
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