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>

04-streaming/obs/obs-studio-setup-encoding.md

@@ -118,6 +118,31 @@ echo "v4l2loopback" | sudo tee /etc/modules-load.d/v4l2loopback.conf
 echo "options v4l2loopback devices=1 video_nr=10 card_label=OBS Virtual Camera exclusive_caps=1" | sudo tee /etc/modprobe.d/v4l2loopback.conf
 ```
 
+## Plugins & Capture Sources
+
+### Captions Plugin (Accessibility)
+
+[OBS Captions Plugin](https://github.com/ratwithacompiler/OBS-captions-plugin) adds real-time closed captions to streams using speech-to-text. Viewers can toggle captions on/off in their player — important for accessibility and for viewers watching without sound.
+
+Install from the plugin's GitHub releases page, then configure in Tools → Captions.
+
+### VLC Video Source (Capture Card)
+
+For capturing from an Elgato 4K60 Pro MK.2 (or similar DirectShow capture card) via VLC as an OBS source, use this device string:
+
+```
+:dshow-vdev=Game Capture 4K60 Pro MK.2
+:dshow-adev=Game Capture 4K60 Pro MK.2 Audio (Game Capture 4K60 Pro MK.2)
+:dshow-aspect-ratio=16:9
+:dshow-chroma=YUY2
+:dshow-fps=0
+:no-dshow-config
+:no-dshow-tuner
+:live-caching=0
+```
+
+Set `live-caching=0` to minimize capture latency. This is useful when OBS's native Game Capture isn't an option (e.g., capturing a separate machine's output through the card).
+
 ## Gotchas & Notes
 
 - **Test your stream before going live.** Record a short clip and watch it back. Artifacts in the recording will be worse in the stream.