Fix alt linkfor youtu.be urls

src/helpers.cr

@@ -487,7 +487,7 @@ def add_alt_links(html)
       END_HTML
     elsif url.host == "youtu.be"
       alt_link = <<-END_HTML
-      <a href="/watch?v=#{url.full_path.lchop("/")}">
+      <a href="/watch?v=#{url.path.try &.lchop("/")}&#{url.query}">
         <i class="fa fa-link" aria-hidden="true"></i>
       </a>
       END_HTML