Vary user-agent

src/invidious/helpers/proxy.cr

@@ -95,7 +95,10 @@ class HTTPClient < HTTP::Client
     if self.host == "www.youtube.com"
       request.headers["x-youtube-client-name"] ||= "1"
       request.headers["x-youtube-client-version"] ||= "1.20180719"
-      request.headers["user-agent"] ||= "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36"
+      request.headers["user-agent"] ||= random_user_agent
+      request.headers["accept-charset"] ||= "ISO-8859-1,utf-8;q=0.7,*;q=0.7"
+      request.headers["accept"] ||= "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
+      request.headers["accept-language"] ||= "en-us,en;q=0.5"
     end
 
     super