diff --git a/feature.go b/feature.go
index 3125e27..1950b0a 100644
--- a/feature.go
+++ b/feature.go
@@ -28,22 +28,6 @@ var (
 	}
 )
 
-var (
-	featureLangOther = Feature[string]{
-		name:  "lang",
-		value: "_",
-	}
-	featureSubOther = Feature[string]{
-		name:  "sub",
-		value: "_",
-	}
-)
-
-func PrintAllFeatures() {
-	fmt.Printf("string features: %#v\n", stringFeatures)
-	fmt.Printf("bool features: %#v\n", boolFeatures)
-}
-
 var (
 	// string features are user-defined. 'primary key' is name and value
 	stringFeatures = []*Feature[string]{}
@@ -52,6 +36,11 @@ var (
 	boolFeatures = []*Feature[bool]{Feature1080p, Feature720p, FeatureTrusted}
 )
 
+func PrintAllFeatures() {
+	fmt.Printf("string features: %#v\n", stringFeatures)
+	fmt.Printf("bool features: %#v\n", boolFeatures)
+}
+
 func makeStringFeature(name, value string, priority int, essential bool) *Feature[string] {
 	for _, feature := range stringFeatures {
 		if feature.name == name && feature.value == value {
@@ -79,9 +68,9 @@ func GetStringFeature(name, value string) *Feature[string] {
 
 	// lang and sub features have their special '_' value
 	if name == "lang" {
-		return makeStringFeature(name, value, featureLangOther.priority, featureLangOther.essential)
+		return makeStringFeature(name, value, 0, false)
 	} else if name == "sub" {
-		return makeStringFeature(name, value, featureSubOther.priority, featureSubOther.essential)
+		return makeStringFeature(name, value, 0, false)
 	}
 
 	panic("TODO")
@@ -105,6 +94,14 @@ func ParseEssentialFeatures(essentialFeatureString string) {
 	}
 }
 
+func ParsePrioritizedFeatures(prioritizedFeatureString string) {
+	featureSpecs := strings.Split(prioritizedFeatureString, ",")
+
+	for index, featureSpec := range featureSpecs {
+		handleFeatureSpec(featureSpec, len(featureSpec)-index, false)
+	}
+}
+
 func handleFeatureSpec(featureSpec string, priority int, essential bool) {
 	data := strings.Split(featureSpec, ":")
 	name := data[0]