What do you all use to learn new openings?

Just curious

For me, it depends on how knowledgeable I am already in that opening (or not) and how serious I am with that new opening (Is it a new variation to implement into my opening repertoire? Is it for casual chess? Is it for prep against a particular player? etc.)

Some resources I use for openings are (in no order and I'm sure I use others too I'm forgetting)

- engine messing around with variations and seeing what is more playable and what ideas look interesting

- chess books

- opening databases

- YouTube videos

- literally typing in that opening into Wikipedia as that is a good resource for summarizing some basics (especially for popular mainlines)

* I don't think it matters as much "where" you get the opening ideas from as much as "how" you choose to learn the concepts and implement those elements into your own game.

Most of the time I use a PGN editor to learn the best moves and responses for both White and Black, accompanied by YouTube videos to learn the common opening mistakes and how to punish them as well as the traps that can be set. 

@1

"What do you all use to learn new openings?"
++ Do not learn, just play and analyse afterwards.

D4 can be a very descent opening but beware it can alsof end in hells h

D4 can be a very descent opening but beware it can alsof end in hells bells and a very premature and sad ending if you have a shrewd and skillfull opponent

My method for learning the opening is:

Play the opening.

Lose.

Figure out why I lost. Play the opening again.

Lose again. 

Rinse and repeat.

.

It works for me.

I would go to the wikipedia page of the opening have a quick read maybe play the moves on a board or watch a YouTube video which gives a brief overview, then I would go to lichess database I would ignore the masters database and set it to the online lichess database correspondence only (2018 to present) and see what players play 80 percent of the time.

That sounds like a pretty great way to lose a game you could've won due to lack of opening knowledge. 

Books are the primary source right now. I have hundreds of books in pdf. Apart from this, I have chessbase software also. But, I rarely use it

book

i never like learning anyways.