Go to 16 min 20s in for Bird Opening. At the end of the segment this opening is put into the garbage category.
Any thoughts on the Bird's Opening?

its basically a reverse dutch if black plays d5, whether that's a good thing for white idk. you can also get a transposition into a kings gambit after 1. f4 e5 2. e4

The bird's is very sound. Although it "opens up your king", it is really no different from the very sound closed sicilian lines (transposes often), and often you can get extremely aggressive with f5 push.

I used the bird's opening from 1800-2000, and I play the leningrad bird in bullet (albeit by a different move order)

The bird's is very sound. Although it "opens up your king", it is really no different from the very sound closed sicilian lines (transposes often), and often you can get extremely aggressive with f5 push.
from's gambit
barely sound. Lasker's line is bad, your h5 variation is bad, Bg4 variation is not the best either.
Mestel and the triple pawn sac line (my personal favorite) aren't studied.

The bird's is very sound. Although it "opens up your king", it is really no different from the very sound closed sicilian lines (transposes often), and often you can get extremely aggressive with f5 push.
from's gambit
transpose back into a forced draw Muzio gambit with 2. e4

The bird's is very sound. Although it "opens up your king", it is really no different from the very sound closed sicilian lines (transposes often), and often you can get extremely aggressive with f5 push.
from's gambit
barely sound. Lasker's line is bad, your h5 variation is bad, Bg4 variation is not the best either.
Mestel and the triple pawn sac line (my personal favorite) aren't studied.
no my h5 variation is not bad
I'd be happy to play with that sort of initiative down a whole piece, never mind a pawn
it is bad, I used to be happy with an initiative over material but now I know how to defend

The bird's is very sound. Although it "opens up your king", it is really no different from the very sound closed sicilian lines (transposes often), and often you can get extremely aggressive with f5 push.
Hm. Interesting.

Also if it's barely sound then why do you play it against f4...
it's fun lol
here's my own at home analysis

Oh, found another forum: https://www.chess.com/forum/view/chess-openings/is-the-bird-f4-a-sound-opening

I honestly used to think that Bird's opening was bad, but you can transpose into a stonewall, or just play it like a reverse dutch. Or, not even play f4 in the first move and then push f4 later after some development.

I honestly used to think that Bird's opening was bad, but you can transpose into a stonewall, or just play it like a reverse dutch. Or, not even play f4 in the first move and then push f4 later after some development.
I see.

The bird's is very sound. Although it "opens up your king", it is really no different from the very sound closed sicilian lines (transposes often), and often you can get extremely aggressive with f5 push.
from's gambit
barely sound. Lasker's line is bad, your h5 variation is bad, Bg4 variation is not the best either.
Mestel and the triple pawn sac line (my personal favorite) aren't studied.
no my h5 variation is not bad
I'd be happy to play with that sort of initiative down a whole piece, never mind a pawn
it is bad, I used to be happy with an initiative over material but now I know how to defend
no you don't
if i had seen 11...h3 you would have lost instantly
After 10.h3 whites winning, if you want to play that “what if” game.

I honestly used to think that Bird's opening was bad, but you can transpose into a stonewall, or just play it like a reverse dutch. Or, not even play f4 in the first move and then push f4 later after some development.
People who think the birds opening is bad either are too low rated and/or subject the opening to a superficial analysis or are a super gm who spent lots of time going in depth analysis of the opening avrukh-style, and can demonstrate a tangible advantage for black amid the myriad of white setups. Since the second has obviously never happened...

Me: *loads the h5 position into SF and lets it run for an hour or two to prove you wrong*
SF depth 50: 2.5
sigh
I mean what do you expect from moving pawns for the first four moves

As someone else astutely said in another one of the many Bird's Opening threads: "Bird's Opening is not great, but it is not horrible."
It allows black to equalize instantly, so it's not as good as 1.e4 or 1.d4 (or 1.Nf3). But it has not been refuted.
If someone plays From's Gambit against it (1.f4 e5), white should just accept the gambit, and make black prove they have compensation for the pawn. Don't transpose to the King's Gambit by replying 2.e4 since the King's Gambit is (IMO) easily frustrated by 2...d5 (Falkbeer Counter-Gambit).
Any? Doesn't it unnecessarily open up your king?