Add orig_name field to video outputs (#3700)

* Add orig_name to video

* Fix test

* CHANGELOG

* Lint

CHANGELOG.md

@@ -58,7 +58,7 @@ No changes to highlight.
 - Copy everything in website Dockerfile, fix build issues by [@aliabd](https://github.com/aliabd) in [PR 3659](https://github.com/gradio-app/gradio/pull/3659) 
 - Raise error when an event is queued but the queue is not configured by [@freddyaboulton](https://github.com/freddyaboulton) in [PR 3640](https://github.com/gradio-app/gradio/pull/3640)    
 - Allows users to apss in a string name for a built-in theme, by [@abidlabs](https://github.com/abidlabs) in [PR 3641](https://github.com/gradio-app/gradio/pull/3641)  
-
+- Added `orig_name` to Video output in the backend so that the front end can set the right name for downloaded video files by [@freddyaboulton](https://github.com/freddyaboulton) in [PR 3700](https://github.com/gradio-app/gradio/pull/3700)     
 
 ## Contributors Shoutout:
 

gradio/components.py

@@ -2138,7 +2138,7 @@ class Video(
             y = output_file_name
 
         y = self.make_temp_copy_if_needed(y)
-        return {"name": y, "data": None, "is_file": True}
+        return {"name": y, "data": None, "is_file": True, "orig_name": Path(y).name}
 
     def style(self, *, height: int | None = None, width: int | None = None, **kwargs):
         """

test/test_components.py

@@ -1292,6 +1292,7 @@ class TestVideo:
         assert output1.endswith("mp4")
         output2 = video_output.postprocess(y_vid_path)["name"]
         assert output1 == output2
+        assert video_output.postprocess(y_vid_path)["orig_name"] == "video_sample.mp4"
 
         assert video_output.deserialize(
             {