basic runner format; write a MAIN function

zsh/media/youtube/download

@@ -1,13 +1,8 @@
 #!/bin/zsh
-DEPENDENCIES+=()
-REQUIRED_ENV+=()
-
 use media/youtube
-
-CHECK_ENVIRONMENT
 #####################################################################
 
-DOWNLOAD_VIDEO() {
+MAIN() {
 	local URLS=($@)
 
 	[[ ${#URLS[@]} -eq 0 ]] && URLS=($(echo '' | FZF_HEAD 'enter URL'))
@@ -23,6 +18,3 @@ DOWNLOAD_VIDEO() {
 		&& SUCCESS "downloaded to '$YT__OUTPUT_DIR/$FILENAME'" \
 		|| { ERROR "failed to download '$FILENAME'"; return 2; }
 }
-
-#####################################################################
-DOWNLOAD_VIDEO $@