Chescaleigh on "[Plugin: IX Show Latest YouTube] "no videos found for channel""

I updated the plugin settings to include my YT user name and how many videos I'd like to show, but when I add the shortcode
"No more videos found for channel chescaleigh" is what displays. Should I be putting something other than my channel name for "YouTube ID"? Please advise! Thanks!

https://wordpress.org/plugins/ix-show-latest-youtube/