Use hash instead of btree for channel_videos_ucid_idx

config/sql/channel_videos.sql

@@ -33,6 +33,6 @@ CREATE INDEX channel_videos_published_idx
 -- DROP INDEX public.channel_videos_ucid_idx;
 
 CREATE INDEX channel_videos_ucid_idx
-    ON public.channel_videos USING btree
+    ON public.channel_videos USING hash
     (ucid COLLATE pg_catalog."default")
     TABLESPACE pg_default;