clear cache for youtube-dl

app.py

@@ -33,12 +33,18 @@ def select_video_format(url, format_note='480p', ext='mp4'):
     return(format_id, fps)
 
 def download_video(url,format_id):
+    # testing
+    print(f"testing...all the files in local directory: {os.listdir('.')}")
     ydl_opts = {
       'format':format_id,
       'outtmpl': "%(id)s.%(ext)s"}
-    meta = youtube_dl.YoutubeDL(ydl_opts).extract_info(url)
-    save_location = meta['id'] + '.' + meta['ext']
-    return(save_location)
+    with youtube_dl.YoutubeDL(ydl_opts) as ydl:
+        try:
+            ydl.cache.remove()
+            meta = ydl.extract_info(url)
+            save_location = meta['id'] + '.' + meta['ext']
+        except youtube_dl.DownloadError as error:
+            print(f'error with download_video function: {error}')
 
 def process_video_parallel(video, skip_frames, dest_path, num_processes, process_number):
     cap = cv2.VideoCapture(video)