text: from flask import Flask
  from flask import request
  from jinja2 import Template
  app = Flask(__name__)
  
  @app.route("/")
  def hello():
      return "<a href='/modis'>Modis Video</a><br/><a href='/useragent'>Mon user-agent</a>"
  
  @app.route("/modis")
  def modis():
      return '<iframe width="560" height="315" src="https://www.youtube.com/embed/4hzGMqk0-us" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>'
  
  @app.route("/useragent")
  def useragent():
      template = """mon user agent est: {{ ua }}"""
      data = {
          "ua": request.user_agent.string
      }
      jtemplate = Template(template)
      return jtemplate.render(data)
  