Test site and shortcodes that is very helpfull thanks. But according to forum rules you should open a new thread.
Anyway I will answer here because I have this feeling that @reidwalley is one of those people who ask questions and never come back + It’s the It seems the same issue. I actually said before that I wont do this anymore but waiting for a new thread to be created to then andswer is …
So, as the changelog said 3.1.0 intoduced this new “Aligned Maximal Width” setting so what I am seeing on your link seems to be perfectly right.
The 100% width is only when not using align and this is on purpose. Because it makes no sense to use align if you want the video to be 100% since then you not seen any difference no matter what aligment is set so I introduced this new setting so users can easy have 100% width video + aligned ones without any extra prameters.
So if you want 100% simple do not use align. Or you could explain to me why you think that makes sense because right now to me it does not. You also can of course set the new “Aligned Maximal Width” setting to a higher value if you want aligned videos that are bigger then the default 400px.
Hope that helps and please answer.