wiki: add 4 new articles from archive, merge 8 archive notes into existing articles (73 articles)

New: mdadm RAID rebuild, Mastodon instance tuning, Ventoy, Fedora networking/kernel recovery.
Merged: Glacier Deep Archive into rsync, SpamAssassin into hardening checklist,
OBS captions/VLC capture into OBS setup, yt-dlp subtitles/temp fix into yt-dlp.
Updated index.md, README.md, SUMMARY.md with 21 previously missing articles.
Fixed merge conflict in index.md Recently Updated table.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

03-opensource/media-creative/yt-dlp.md

@@ -118,10 +118,33 @@ tail -f ~/yt-download.log
 
 ---
 
+## Subtitle Downloads
+
+The config above handles subtitles automatically via `--write-auto-subs` and `--embed-subs`. For one-off downloads where you want explicit control over subtitle embedding alongside specific format selection:
+
+```bash
+yt-dlp -f 'bestvideo[vcodec^=avc]+bestaudio[ext=m4a]/bestvideo+bestaudio' \
+    --merge-output-format mp4 \
+    -o "/plex/plex/%(title)s.%(ext)s" \
+    --write-auto-subs --embed-subs URL
+```
+
+This forces H.264 video + M4A audio when available — useful when you want guaranteed Apple TV / Plex compatibility without running the HEVC conversion hook.
+
+---
+
 ## Troubleshooting
 
 For YouTube JS challenge errors, missing formats, and n-challenge failures on Fedora — see [yt-dlp YouTube JS Challenge Fix](../../05-troubleshooting/yt-dlp-fedora-js-challenge.md).
 
+**YouTube player client errors:** If downloads fail with extractor errors, YouTube may have broken the default player client. Override it:
+
+```bash
+yt-dlp --extractor-args "youtube:player-client=default,-tv_simply" URL
+```
+
+This can also be added to your config file as a persistent workaround until yt-dlp pushes a fix upstream. Keep yt-dlp updated — these breakages get patched regularly.
+
 ---
 
 ## Tags