refactor(upload): 优化视频上传异常处理逻辑

- 移除了注释的异常捕获代码块
- 在准备视频文件时增加异常捕获，返回 None 以避免抛出异常
- 删除了多余的注释和未使用的代码

service/upload_video.py

@@ -633,14 +633,15 @@ def is_video_corrupted(file_path):
 def upload_video_with_multithreading(task):
     """多线程视频上传主函数"""
     # 准备视频文件（同原逻辑）
-    # try:
-    file_path = prepare_video_file(task)
+    try:
+        file_path = prepare_video_file(task)
     # except VideoError:
     #     # 视频时长超过60秒, 使用生成视频
     #     video_info = generate_video(task)
     #     return video_info
-    # except Exception as e:
-    #     raise e
+    except Exception as e:
+        return None
+        # raise e
     # 初始化上传
     upload = Upload(task)
     upload.file_size = os.path.getsize(file_path)