class Decidim::Meetings::MeetingIframeEmbedder

def transform_youtube_url(uri)

and appending the video id
2. Create a new URL using the domain youtube-nocookie.com, converting it to an embed
1. extract the video id from the parameter v
Youtube transformation consists on: 
def transform_youtube_url(uri)
  return online_meeting_service_url if uri.query.blank?
  parsed_query = CGI.parse(uri.query)
  video_id = parsed_query.has_key?("v") ? CGI.parse(uri.query).fetch("v")&.first : nil
  return online_meeting_service_url if video_id.blank?
  "https://www.youtube-nocookie.com/embed/#{video_id}"
end