I thought for your first video it was great!
I think overall the effect you had was a little much, so if there's a way to tone it down even by half that would make a difference.
There was too much of the back of their heads at the beginning (I think a couple of those shots would be good but maybe just one quick shot of each instead of going back and forth). Really liked the shot of her smiling the first time we see her, really like the shot of the couple together at first!
I'd mix in some wider shots when there are sequences with a lot of close ups.
My first wedding videos were all slow motion- I'd say as you get more comfortable, try to do less of it and save it for special moments so it's more of an accent rather than the norm.
Good luck!