Improve series listings on video articles.

content/posts/videos/channel-update-2026-01.md

@@ -17,8 +17,10 @@ video_desc: # List of video description paragraphs.
   - 
 tags:
   - video
-series:
   - channel update
+series:
+  - freestyle friday
+  - channel updates
 categories:
   - videos
 aliases:

content/posts/videos/grayjay.md

@@ -25,6 +25,7 @@ tags:
   - grayjay
   - app
 series:
+  - tech tuesday
   - apps
 categories:
   - videos

content/posts/videos/solar-panel-angle.md

@@ -23,6 +23,7 @@ tags:
   - power station
   - nomad
 series:
+  - tech tuesday
   - solar
 categories:
   - videos