Hello Paul,
I like and use the video addon, and as you have mentioned, normal horizontal videos are what we predominately use. Also, how the video addon functions showing the video thumbnail prior to playing it is great, love it.
But I have been asked to create some vertical videos for the front page especially for mobile visitors. For desktop users, there is less of a point to using a vertical video in my opinion.
In my case, it makes sense to use a button to activate the video as showing the video thumbnail would take up too much space (especially if it was a proper vertical video). That is why i chose the modal addon, as it allows you to choose other options instead of the standard thumbnail.
I am glad to hear this feature is coming in upcoming updates, thank you. Hopefully you can implement it into modal addon at the same time.
Thank you for your help, and have a great day.