update desc

app.py

@@ -177,8 +177,9 @@ if __name__ == "__main__":
         )
         gr.Markdown(
             "Analyse the transcriptions generated by the Whisper large-v2 and large-32-2 models on the TEDLIUM dev set. "
+            "Analysis is performed on the overall level, shown at the top of the demo, and also a per-sample level, shown below. "
             "The transcriptions for both models are shown at the bottom of the demo. The text diff for each is computed "
-            "relative to the target transcriptions. Insertions are displayed in <span style='background-color:Lightgreen'>green</span>, and "
+            "relative to the target transcriptions, where insertions are displayed in <span style='background-color:Lightgreen'>green</span>, and "
             "deletions in <span style='background-color:#FFCCCB'><s>red</s></span>."
         )
         gr.Markdown("**Overall statistics:**")