username=`echo "$content" | grep -o -P '(?<="creator_id":).*?(?=,)' | head -1`

# try multiple labels, in case some only work sometimes

if [[ ! -n "$username" ]]
then
	username=`echo $content | grep -o -P '(?<="owner":{"id":).*?(?=,"display_name":")' | head -1`
fi

if [[ ! -n "$username" ]]
then
	username=`echo $content | grep -o -P '(?<="item":{"@id":"https://vimeo.com/user).*?(?=","name":)' | head -1`
fi

# return URL only if username was found
if [[ -n "$username" ]]
then
	rss="https://vimeo.com/user$username/videos/rss"
	page_ext=$rss
fi