Fix watch for videos that don't have fmt_stream

src/invidious.cr

@@ -151,11 +151,13 @@ get "/watch" do |env|
     fmt_stream << HTTP::Params.parse(string)
   end
 
+  if fmt_stream[0]?
     if fmt_stream[0]["s"]?
       fmt_stream.each do |fmt|
         fmt["url"] = "#{fmt["url"]}&signature=#{decrypt_signature(fmt["s"])}"
       end
     end
+  end
 
   # We want lowest quality first
   fmt_stream.reverse!
@@ -167,11 +169,13 @@ get "/watch" do |env|
     end
   end
 
+  if adaptive_fmts[0]?
     if adaptive_fmts[0]["s"]?
       adaptive_fmts.each do |fmt|
         fmt["url"] = "#{fmt["url"]}&signature=#{decrypt_signature(fmt["s"])}"
       end
     end
+  end
 
   rvs = [] of Hash(String, String)
   if video.info.has_key?("rvs")

src/views/search.ecr

@@ -7,7 +7,7 @@
 <% slice.each do |video| %>
     <div class="pure-u-1 pure-u-md-1-4">
         <div style="margin:1em;">
-            <a style="width:100%;" class="link" href="/watch?v=<%= video["link"] %>">
+            <a style="width:100%;" class="link" href="<%= video["link"] %>">
                 <img style="width:100%;" src="<%= video["thumbnail"] %>"/>
                 <%= video["title"] %>
             </a>