Add show results

Signed-off-by: Jael Gu <mengjia.gu@zilliz.com>

README.md

@@ -28,9 +28,10 @@ import towhee
     towhee.glob('./archery.mp4')
           .video_decode.ffmpeg()
           .video_classification.pytorchvideo(model_name='slowfast_r50')
-          .to_list()
+          .show()
 )
 ```
+<img src="./result1.png" height="45px"/>
 
 *Write a same pipeline with explicit inputs/outputs name specifications:*
 
@@ -43,10 +44,10 @@ import towhee
           .video_classification.pytorchvideo['frames', ('labels', 'scores', 'features')](
                 model_name='slowfast_r50')
           .select['labels', 'scores', 'features']()
-          .show()
+          .show(formatter={'path':'video_path'})
 )
 ```
-
+<img src="./result2.png" height="80px"/>
 
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