<button type="button" class="btn btn-primary waves-effect waves-light" data-mdb-toggle="modal" data-mdb-target="#modalYT">Test Art Union</button>

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<div class="modal fade" id="modalYT" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">

        <div class="modal-dialog modal-lg" role="document">

        <!--Content-->

        <div class="modal-content">

          <!--Body-->

          <div class="modal-body mb-0 p-0">

          <div class="embed-responsive embed-responsive-16by9 z-depth-1-half">

            <iframe class="embed-responsive-item" src="https://www.youtube.com/embed/yLkrvn_9JF8" allowfullscreen=""></iframe>

          </div>

          </div>

          <!--Footer-->

          <div class="modal-footer justify-content-center flex-column flex-md-row">

          <span class="mr-4">Titre Adel est un grand</span>

          <button type="button" class="btn btn-outline-primary btn-rounded btn-md ml-4 waves-effect waves-light" data-dismiss="modal">Close</button>

          </div>

        </div>

        <!--/.Content-->

        </div>

      </div>