only ignore smaller trending categories on default trending tab

src/invidious/trending.cr

@@ -22,12 +22,14 @@ def fetch_trending(trending_type, region, locale)
 
   extracted = [] of SearchItem
 
+  deduplicate = items.size > 1
+
   items.each do |itm|
     if itm.is_a?(Category)
       # Ignore the smaller categories, as they generally contain a sponsored
       # channel, which brings a lot of noise on the trending page.
       # See: https://github.com/iv-org/invidious/issues/2989
-      next if itm.contents.size < 24
+      next if (itm.contents.size < 24 && deduplicate)
 
       extracted.concat extract_category(itm)
     else