[enh] using less html code to disable autoescaping for embeded results

searx/templates/oscar/result_templates/default.html

 
 {% if result.embedded %}
 <div id="result-media-{{ index }}" class="collapse">
-{% autoescape false %}
-   {{ result.embedded }}
-{% endautoescape %}
+   {{ result.embedded|safe }}
 </div>
 {% endif %}
 

searx/templates/oscar/result_templates/videos.html

 
 {% if result.embedded %}
 <div id="result-video-{{ index }}" class="collapse">
-{% autoescape false %}
-   {{ result.embedded }}
-{% endautoescape %}
+   {{ result.embedded|safe }}
 </div>
 {% endif %}