Add poster attribute and disable autoplay on GIFs

* Add the poster attribute even if a post claims to be type gif. Default to none-preloading for gifs like video-typed posts do.

* Disable autoplay for videos in feeds

Co-authored-by: Spike <19519553+spikecodes@users.noreply.github.com>

templates/utils.html

@@ -99,7 +99,7 @@
 		</svg>
 	</a>
 	{% else if (prefs.layout.is_empty() || prefs.layout == "card") && post.post_type == "gif" %}
-	<video class="post_media_video short" src="{{ post.media.url }}" width="{{ post.media.width }}" height="{{ post.media.height }}" controls loop autoplay><a href={{ post.media.url }}>Video</a></video>
+	<video class="post_media_video short" src="{{ post.media.url }}" width="{{ post.media.width }}" height="{{ post.media.height }}" poster="{{ post.media.poster }}" controls loop preload="none"><a href={{ post.media.url }}>Video</a></video>
 	{% else if (prefs.layout.is_empty() || prefs.layout == "card") && post.post_type == "video" %}
 	{% if prefs.use_hls == "on" && !post.media.alt_url.is_empty() %}
 	<video class="post_media_video short" width="{{ post.media.width }}" height="{{ post.media.height }}" poster="{{ post.media.poster }}" controls preload="none">
@@ -107,7 +107,7 @@
 		<source src="{{ post.media.url }}" type="video/mp4" />
 	</video>
 	{% else %}
-	<video class="post_media_video short" src="{{ post.media.url }}" width="{{ post.media.width }}" height="{{ post.media.height }}" poster="{{ post.media.poster }}" preload="none" controls autoplay><a href={{ post.media.url }}>Video</a></video>
+	<video class="post_media_video short" src="{{ post.media.url }}" width="{{ post.media.width }}" height="{{ post.media.height }}" poster="{{ post.media.poster }}" preload="none" controls><a href={{ post.media.url }}>Video</a></video>
 	{% call render_hls_notification(format!("{}%23{}", &self.url[1..].replace("&", "%26").replace("+", "%2B"), post.id)) %}
 	{% endif %}
 	{% else if post.post_type != "self" %}