Make sure to only apply fix if QUIC is disabled

src/invidious/yt_backend/youtube_api.cr

@@ -425,8 +425,11 @@ module YoutubeAPI
       )
     end
 
-    # Decompress the body ourselves, given that auto-decompress is
+    if {{ !flag?(:disable_quic) }} && CONFIG.use_quic
-    # broken in the Crystal stdlib.
+      body = response.body
+    else
+      # Decompress the body ourselves, when using HTTP::Client given that
+      # auto-decompress is broken in the Crystal stdlib.
       # Read more:
       #  - https://github.com/iv-org/invidious/issues/2612
       #  - https://github.com/crystal-lang/crystal/issues/11354
@@ -439,6 +442,7 @@ module YoutubeAPI
       else
         body = response.body
       end
+    end
 
     # Convert result to Hash
     initial_data = JSON.parse(body).as_h