What value should I send for SameSite = None and Secure?

[y024022]

Chrome update has given me great trouble
So far, I still haven't found anyone's answer in Chrome 80 that correctly answers SameSite issuess.
Leave the following questions for me and us.

In my html page, there is only <iframe> provided by YouTube.
However, in Chrome, 'cross-site requests if they are set with SameSite = None and Secure' are displayed.

What should I do?

I only did YouTube iframe, what value should I send cookie value and session value?
I want a direct solution.

A fake method like 'cross-site-cookie = name' doesn't help me.
I need a direct way to experience.

I want about php version <7.3 and I want to solve the problem with php or javascript or .htaccess etc.

** If you use only <iframe> tag as well as YouTube, a danger sign is displayed unconditionally.
I don't know the value required by the external urls. What value should I send to the external urls as a session?

[rowan-m]

If you are embedding a YouTube video, then you do not need to manage any cookies related to this. The cookie you're showing for the eie.co.kr domain is not going to be related to your video embed.

What do you mean by a "danger sign"? Is your embedded video working?