old_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  import re
  
  from django.db import models
  
  from glitter.models import BaseBlock
  
  from .validators import validate_url, YOUTUBE_URL_RE, VIMEO_URL_RE
  
  
  class Video(BaseBlock):
      url = models.URLField(
          'URL',
          help_text='YouTube, Vimeo videos only',
          validators=[validate_url],
      )
      html = models.TextField(editable=False)
      title = models.CharField(max_length=150, blank=True, help_text='Used for accessibility')
  
      class Meta:
          verbose_name = 'video'
  
      def get_embed_url(self):
          """ Get correct embed url for Youtube or Vimeo. """
          embed_url = None
          youtube_embed_url = 'https://www.youtube.com/embed/{}'
          vimeo_embed_url = 'https://player.vimeo.com/video/{}'
  
          # Get video ID from url.
          if re.match(YOUTUBE_URL_RE, self.url):
              embed_url = youtube_embed_url.format(re.match(YOUTUBE_URL_RE, self.url).group(2))
          if re.match(VIMEO_URL_RE, self.url):
              embed_url = vimeo_embed_url.format(re.match(VIMEO_URL_RE, self.url).group(3))
          return embed_url
  
      def save(self, force_insert=False, force_update=False, using=None, update_fields=None):
          """ Set html field with correct iframe. """
          if self.url:
              self.html = """<iframe src="{}" frameborder="0" title="{}" allowfullscreen></iframe>""".format(
                  self.get_embed_url(),
                  self.title
              )
          return super(Video, self).save(force_insert, force_update, using, update_fields)
  
new_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  import re
  
  from django.db import models
  
  from glitter.models import BaseBlock
  
  from .validators import validate_url, YOUTUBE_URL_RE, VIMEO_URL_RE
  
  
  class Video(BaseBlock):
      url = models.URLField(
          'URL',
          help_text='YouTube, Vimeo videos only',
          validators=[validate_url],
      )
      html = models.TextField(editable=False)
      title = models.CharField(max_length=150, blank=True, help_text='Used for accessibility')
  
      class Meta:
          verbose_name = 'video'
  
      def get_embed_url(self):
          """ Get correct embed url for Youtube or Vimeo. """
          embed_url = None
          youtube_embed_url = 'https://www.youtube.com/embed/{}'
          vimeo_embed_url = 'https://player.vimeo.com/video/{}'
  
          # Get video ID from url.
          if re.match(YOUTUBE_URL_RE, self.url):
              embed_url = youtube_embed_url.format(re.match(YOUTUBE_URL_RE, self.url).group(2))
          if re.match(VIMEO_URL_RE, self.url):
              embed_url = vimeo_embed_url.format(re.match(VIMEO_URL_RE, self.url).group(3))
          return embed_url
  
      def save(self, force_insert=False, force_update=False, using=None, update_fields=None):
          """ Set html field with correct iframe. """
          if self.url:
              iframe_html = '<iframe src="{}" frameborder="0" title="{}" allowfullscreen></iframe>'
              self.html = iframe_html.format(
                  self.get_embed_url(),
                  self.title
              )
          return super(Video, self).save(force_insert, force_update, using, update_fields)
  
subject: Refactor code for line length