Add video to upload page hint

Author: pablodiegoss

src/core/jinja2/core/ar.jinja2

@@ -40,7 +40,7 @@
         {% for id, artwork in enumerate(artworks) %}
             <ar-marker id="marker-{{ id }}" src="{{ artwork.marker.marker_img.url }}">
             {% if artwork.augmented.file_extension == 'gif' %}
-                <ar-content id="content-{{ id }}" src="{{ artwork.augmented.spritesheet_file.url }}" type="spritesheet" metadata="{{artwork.augmented.spritesheet_metadata.url }}"></ar-content>
+                <ar-content id="content-{{ id }}" src="{{ artwork.augmented.spritesheet_file.url }}" type="spritesheet" metadata="{{ artwork.augmented.spritesheet_metadata.url }}"></ar-content>
             {% elif artwork.augmented.file_extension == 'mp4' %}
                 <ar-content id="content-{{ id }}" src="{{ artwork.augmented.source.url }}" type="video"></ar-content>
             {% elif artwork.augmented.file_extension == 'png' %}

src/core/jinja2/core/templates/object_edit_template.jinja2

@@ -23,4 +23,4 @@
        {% endif %}
        {% endfor %}
        style="height: auto">
-<p style="font-size: small; text-align: left; padding: 0 10px">(.gif, .glb)</p>
+<p style="font-size: small; text-align: left; padding: 0 10px">(.gif, .glb, .mp4)</p>