We’d like to help – if you’re talking about adding videos to your watch later playlist, check out this page for step by step instructions: https://yt.be/help/jpvQ . Also, here’s a good resource regarding YT premiere, including FAQs. Let us know if that helps!
That feature isn't available at the moment, but that's a good suggestion! We use the Send Feedback tool to track all requests: https://yt.be/help/feedback . That's how we collect and prioritize requests!