Misaka based HtmlRenderer that lets you embed youtube and vimeo videos

video_links.py

from misaka import HtmlRenderer
import re

SOURCES = {
  "youtube": {
    "re": r'https?://(www\.|)youtube\.com/watch\?\S*v=(?P<youtube>[A-Za-z0-9_&=-]+)\S*',
    "embed": u"//www.youtube.com/embed/%s"
  },
  "vimeo": {
    "re": r'https?://(www\.|)vimeo\.com/(?P<vimeo>\d+)\S*',
    "embed": u"//player.vimeo.com/video/%s"
  }
}

class VideoLinkRenderer(HtmlRenderer):
  def setup(self):
    super(VideoLinkRenderer, self).setup()
  
  def image(self, link, title, alt):
    for key, val in SOURCES.items():
      match = re.match(val["re"], link)
      if match and match.group(key):
        video_id = match.group(key)
        return self.make_iframe(video_id.strip(), key, alt, title)
    return u"<img src='{0}' alt='{1}' title='{2}'/>".format(link, alt, title)

  def make_iframe(self, id, video_type, alt, title):
    url = SOURCES[video_type]["embed"] % id
    return u"<iframe class='{2}' src='{0}' alt='{1}' title='{3}' allowfullscreen></iframe>" \
      .format(url, alt, video_type, title)