Fix import issues:

- Add __all__ list to exceptions.py
- Fix absolute imports to use relative imports
- Fix duplicate imports
- Fix truncated code in download_core.py
- Add missing imports and type hints
- Fix indentation and formatting issues

videoarchiver/utils/compression_handler.py

@@ -7,11 +7,11 @@ import subprocess
 from datetime import datetime
 from typing import Dict, Optional, Callable, Set, Tuple
 
-from videoarchiver.ffmpeg.ffmpeg_manager import FFmpegManager
-from videoarchiver.ffmpeg.exceptions import CompressionError
-from videoarchiver.utils.exceptions import VideoVerificationError
-from videoarchiver.utils.file_operations import FileOperations
-from videoarchiver.utils.progress_handler import ProgressHandler
+from ..ffmpeg.ffmpeg_manager import FFmpegManager
+from ..ffmpeg.exceptions import CompressionError
+from .exceptions import VideoVerificationError
+from .file_operations import FileOperations
+from .progress_handler import ProgressHandler
 
 logger = logging.getLogger("VideoArchiver")
 
@@ -207,4 +207,5 @@ class CompressionHandler:
                     self._active_processes.discard(process)
 
         except Exception as e:
-            logger.error(f"Compression attempt failed: {str
+            logger.error(f"Compression attempt failed: {str(e)}")
+            return False