diff --git a/apps/participation/forms.py b/apps/participation/forms.py
index fc6249c..907e9fd 100644
--- a/apps/participation/forms.py
+++ b/apps/participation/forms.py
@@ -74,6 +74,11 @@ class UploadVideoForm(forms.ModelForm):
         model = Video
         fields = ('link',)
 
+    def clean(self):
+        if Phase.current_phase().phase_number != 1 and self.instance.link:
+            self.add_error("link", _("You can't upload your video after the deadline."))
+        return super().clean()
+
 
 class PhaseForm(forms.ModelForm):
     class Meta:
diff --git a/apps/participation/templates/participation/participation_detail.html b/apps/participation/templates/participation/participation_detail.html
index 87430d4..6026667 100644
--- a/apps/participation/templates/participation/participation_detail.html
+++ b/apps/participation/templates/participation/participation_detail.html
@@ -23,7 +23,9 @@
                     <dt class="col-sm-2">{% trans "Video link:" %}</dt>
                     <dd class="col-sm-10"><a href="{{ participation.solution.link|default:"#" }}" target="_blank">
                         {{ participation.solution.link|default:novideo }}</a>
-                        <button class="btn btn-primary" data-toggle="modal" data-target="#uploadVideoModal">{% trans "Upload" %}</button>
+                        {% if current_phase.phase_number == 1 or participation.solution.link == "" %}
+                            <button class="btn btn-primary" data-toggle="modal" data-target="#uploadVideoModal">{% trans "Upload" %}</button>
+                        {% endif %}
                     </dd>
                 </dl>
                 {% if participation.solution.platform == "youtube" %}
diff --git a/apps/participation/views.py b/apps/participation/views.py
index 2b76884..5f78982 100644
--- a/apps/participation/views.py
+++ b/apps/participation/views.py
@@ -262,6 +262,14 @@ class ParticipationDetailView(LoginRequiredMixin, DetailView):
             return super().dispatch(request, *args, **kwargs)
         raise PermissionDenied
 
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+
+        context["title"] = lambda: _("Participation of team {trigram}").format(trigram=self.object.team.trigram)
+        context["current_phase"] = Phase.current_phase()
+
+        return context
+
 
 class UploadVideoView(LoginRequiredMixin, UpdateView):
     model = Video