class Decidim::Meetings::MeetingIframeEmbedder

def transform_twitch_url(uri, request_host)

3. build the embed url using both the video ID and the request host as parent argument
2. extract the request host
1. extract the video id from the third URL parameter
Twitch transformation consists on: 
def transform_twitch_url(uri, request_host)
  _, param_name, video_id = *uri.path.split("/")
  return online_meeting_service_url if video_id.blank? || param_name != "videos"
  "https://player.twitch.tv/?video=#{video_id}&parent=#{request_host}"
end