Related videos still show

Please read this: https://www.embedplus.com/how-to-hide-youtube-related-videos.aspx

Is each video that I add to the website a new project?

By project, do you mean Google project? If so, then no. You create a project and then a single API key that should be used for your site.

Then why am I still getting suggested videos?

https://wpcuisine.com/bp/services/
https://wpcuisine.com/bp/services/social-media/
https://wpcuisine.com/bp/services/digital-advertising/
etc

I’ve watched your video several times. I’m thinking that the problem is that I am inserting the videos into the text and not using the video widget. I’m doing that because I don’t want the videos to be full screen.

Therefore, I am not using [embedyt] [/embedyt]. How do I deal with this?

I found a premium plugin that does the job