Was never a butterfly person, but when I was younger, it doesn't seem that hard, now I'm trying it again, and it's much harder than I remember, swallowed a whole bunch of water, enough to fill Chris Christie's body.
And I watched A LOT of youtube videos. I need an actual person to teach me.
Used to swim the butterfly in my younger days. Even than, I could never do more than a few laps(Freestyle is my thing). At my health club, I frequently see a guy swimming who does the butterfly with every workout. The other day he was in the lane next to me, and an enormous wave raced across the lane dividers and basically caused me to swallow water and break my stride, LOL.