Batch rename (serialize) video files

rename.py

from pathlib import Path

# Input parameters
folders = ['/my/video/folder1', '/my/video/folder2']
video_file_types = 'avi flv m4v mkv mov mp4 mpg wmv'.split(' ')

# Folders as pathlib objects
folders = [Path(folder) for folder in folders if Path(folder).is_dir()]

# List and sort all files from all folders
all_files = []
for folder in folders:
    files = folder.rglob('*')
    files = [f for f in files if f.is_file()]
    all_files.extend(files)
    del files
all_files = sorted(all_files, key=lambda x: x.name)

# Keep only video fidles
video_files = [f for f in all_files
               if f.name.split('.')[-1] in video_file_types]

# Rename all video files
for n, file in enumerate(video_files):
    name = file.name
    # New name remove the first 4 chars and then add a new serialization prefix
    new_name = f'{n+1:04d} {name[5:]}'
    print(name)
    print(new_name)
    print('')
    new_filepath = file.parent / new_name
    file.rename(new_filepath)