Fix livestream parsing URLs (#2356)

src/invidious.cr

@@ -3150,7 +3150,7 @@ get "/api/manifest/hls_playlist/*" do |env|
   manifest = response.body
 
   if local
-    manifest = manifest.gsub(/^https:\/\/r\d---.{11}\.c\.youtube\.com[^\n]*/m) do |match|
+    manifest = manifest.gsub(/^https:\/\/\w+---.{11}\.c\.youtube\.com[^\n]*/m) do |match|
       path = URI.parse(match).path
 
       path = path.lchop("/videoplayback/")