Okay, great. I will be very interested in your opinion and critique.
https://fcpxtemplates.com/sdm_downloads/youtube-end-screen-guides/
Here's the deal:
This is a Title.
It has the four different elements of the end screen: Link, Subscribe, Video 1 and Video 2.
Each element can be activated or deactivated if not to used.
The guides are meant to place the element's locations with a"background" of some sort. Shapes can be filled, outlined or both — these are just guides to help you arrange your endscreen in YouTube's End Screen designer.
The Link and the Subscribe elements have a "Sub Card" area (to be used for aligning texts for those items... You can, like just about everything in this tool, leave them on or turn them off after you've placed your texts.
The boundaries of the elements locations are strictly enforced. However you drag around an element (with an OSC), you cannot drag it outside the boundaries set by YouTube.
You can color the area outside the elements boundary, and inside the elements boundary separately.
There is a built in Grid to help you with item placements, and/or, add to your end screen design. There is also a "margin tool" to help lining up outside element edges with repect to the "Bounds" of the layout region.
Here's an example:

The text elements in this example are NOT available with the YT End Screen guides... use the titles (and animation) of your choice.
The idea is to add this design to the end of your video, then in YouTube, use the areas to place the End Screen elements provided by YouTube.
Please let me know when you've downloaded it — I'll be removing it soon after.
Hope you find it useful!