Http referrer problem

Hi,

for me plugin wasn’t working after in google console I added youtube API key restriction HTTP referrers: my website’s url. It showed that referrer is wrong, debugging showed that referrer was the same generated url as $feed_url in fetch_youtube_feed() function. That’s how wp_remote_get() works I suppose.
After I modified fetch_youtube_feed() by adding referer to wp_remote_get headers like this

$wparg = array(
				'timeout' => $this->defaults['timeout'],
				'sslverify' => $this->defaults['sslverify'] ? true : false,
				'headers' => array( 'referer' => site_url() ),
			);

everything is working.
Is nobody protecting their keys with referers or is it only my websites problem?