Below is an example of a python column provider for nautilus.
Identifying poor quality video files 480p, 720p … is difficult in nautilus at a glance.

You need to open the file properties to view the video metadata.
While there are a number of extensions out there for EXIF etc, i decided to implement my own.
Originally i tried to use MediaInfo, but it was far too slow. This is what i ended up with.

To activate it, just login and logout, or kill nautilus and restart it.

Create target directory and file

mkdir -vp ~/.local/share/nautilus-python/extensions
touch ~/.local/share/nautilus-python/extensions/VideoMetaData.py

Install python libraries

pip install hachoir-metadata
pip install hachoir-parser
pip install hachoir-core

Add this to ~/.local/share/nautilus-python/extensions/VideoMetaData.py

#!/usr/bin/python

# dave@fio.ie

import os
import urllib
import logging
import re

import gi
gi.require_version('Nautilus', '3.0')
gi.require_version('Gtk', '3.0')

from gi.repository import Nautilus, GObject, Gtk, Gdk, GdkPixbuf
from hachoir_core.error import HachoirError
from hachoir_core.stream import InputIOStream
from hachoir_parser import guessParser
from hachoir_metadata import extractMetadata


class VideoMetadataExtension(GObject.GObject, Nautilus.ColumnProvider, Nautilus.MenuProvider, Nautilus.InfoProvider):

  def __init__(self):
    logging.basicConfig(filename='/tmp/VideoMetadataExtension.log',level=logging.DEBUG)
    pass


  def get_columns(self):
    return (
      Nautilus.Column(name="NautilusPython::video_width_columnn",attribute="video_width",label="Width",description="Video width"),
      Nautilus.Column(name="NautilusPython::video_height_columnn",attribute="video_height",label="Height",description="Video height"),
    )


  def update_file_info_full(self, provider, handle, closure, file_info):
  
    filename = urllib.unquote(file_info.get_uri()[7:]) 
    video_width = ''
    video_height = ''
    name_suggestion = ''

    file_info.add_string_attribute('video_width', video_width)
    file_info.add_string_attribute('video_height', video_height)
    file_info.add_string_attribute('name_suggestion', name_suggestion)  
  
    if file_info.get_uri_scheme() != 'file':
      logging.debug("Skipped: " + filename)
      return Nautilus.OperationResult.COMPLETE
      
    videomimes = [
      'video/x-msvideo',
      'video/mpeg',
      'video/x-ms-wmv',
      'video/mp4',
      'video/x-flv',
      'video/x-matroska'
    ]
    
    for mime in videomimes:
      if file_info.is_mime_type(mime):
        GObject.idle_add(self.get_video_metadata, provider, handle, closure, file_info)
        logging.debug("in Progress: " + filename)
        return Nautilus.OperationResult.IN_PROGRESS
         
    logging.debug("Skipped: " + filename)
    
    return Nautilus.OperationResult.COMPLETE


  def get_video_metadata(self, provider, handle, closure, file_info):
  
    video_width = ''
    video_height = ''
    name_suggestion = ''
  
    filename = urllib.unquote(file_info.get_uri()[7:])  
    filelike = open(filename, "rw+")
    
    try:
      filelike.seek(0)
    except (AttributeError, IOError):
      logging.debug("Unabled to read: " + filename)
      Nautilus.info_provider_update_complete_invoke(closure, provider, handle, Nautilus.OperationResult.FAILED)
      return False

    stream = InputIOStream(filelike, None, tags=[])
    parser = guessParser(stream)

    if not parser:
      logging.debug("Unabled to determine parser: " + filename)
      Nautilus.info_provider_update_complete_invoke(closure, provider, handle, Nautilus.OperationResult.FAILED)
      return False

    try:
      metadata = extractMetadata(parser)
    except HachoirError:
      logging.debug("Unabled to extract metadata: " + filename)
      Nautilus.info_provider_update_complete_invoke(closure, provider, handle, Nautilus.OperationResult.FAILED)
      return False
          
    if metadata is None:
      logging.debug("Metadata None: " + filename)
      Nautilus.info_provider_update_complete_invoke(closure, provider, handle, Nautilus.OperationResult.FAILED)
      return False

    matchObj = re.search( r'Image width: (.*?) pixels', str(metadata), re.M|re.I)

    if matchObj:
       video_width = matchObj.group(1)
        
    matchObj = re.search( r'Image height: (.*?) pixels', str(metadata), re.M|re.I)

    if matchObj:
       video_height = matchObj.group(1)

    file_info.add_string_attribute('video_width', video_width)
    file_info.add_string_attribute('video_height', video_height)
    file_info.add_string_attribute('name_suggestion', name_suggestion)   
    
    logging.debug("Completed: " + filename)
    
    file_info.invalidate_extension_info()
    
    Nautilus.info_provider_update_complete_invoke(closure, provider, handle, Nautilus.OperationResult.COMPLETE)
    
    return False