Add fix for videos without 'rvs'

src/invidious.cr

@@ -257,11 +257,9 @@ get "/watch" do |env|
   end
 
   rvs = [] of Hash(String, String)
-  if video.info.has_key?("rvs")
-    video.info["rvs"].split(",").each do |rv|
+  video.info["rvs"]?.try &.split(",").each do |rv|
     rvs << HTTP::Params.parse(rv).to_h
   end
-  end
 
   rating = video.info["avg_rating"].to_f64
   engagement = ((video.dislikes.to_f + video.likes.to_f)/video.views * 100)
@@ -2007,7 +2005,7 @@ get "/api/v1/videos/:id" do |env|
 
       json.field "recommendedVideos" do
         json.array do
-          video.info["rvs"].split(",").each do |rv|
+          video.info["rvs"]?.try &.split(",").each do |rv|
             rv = HTTP::Params.parse(rv)
 
             if rv["id"]?

src/invidious/jobs.cr

@@ -24,11 +24,9 @@ def crawl_videos(db)
     end
 
     rvs = [] of Hash(String, String)
-    if video.info.has_key?("rvs")
-      video.info["rvs"].split(",").each do |rv|
+    video.info["rvs"]?.try &.split(",").each do |rv|
       rvs << HTTP::Params.parse(rv).to_h
     end
-    end
 
     rvs.each do |rv|
       if rv.has_key?("id") && !db.query_one?("SELECT EXISTS (SELECT true FROM videos WHERE id = $1)", rv["id"], as: Bool)