Multiple HTML corrections

Alt on favicon
Width of image should be 400 and not 400px
Correct alt+title on image
No <p> contains <p>

searx/templates/courgette/result_templates/videos.html

 <div class="result">
   {% if result['favicon'] %}
-    <img width="14" height="14" class="favicon" src="static/{{theme}}/img/icon_{{result['favicon']}}.ico" />
+    <img width="14" height="14" class="favicon" src="static/{{theme}}/img/icon_{{result['favicon']}}.ico" alt="{{result['favicon']}}" />
   {% endif %}
 
-    <p>
       <h3 class="result_title"><a href="{{ result.url }}">{{ result.title|safe }}</a></h3>
       {% if result.publishedDate %}<p class="published_date">{{ result.publishedDate }}</p>{% endif %}
-      <a href="{{ result.url }}"><img width="400px" src="{{ result.thumbnail }}" title={{ result.title }} alt=" {{ result.title }}"/></a>
+      <a href="{{ result.url }}"><img width="400" src="{{ result.thumbnail }}" title="{{ result.title|striptags }}" alt="{{ result.title|striptags }}"/></a>
       <p class="url">{{ result.url }}</p>
-    </p>
 </div>