Can anyone help me this in photoshop?

Hi! Im new to photoshop. Can anyone help me how they make black thingy? Like saturation linked to black background with png character in it?

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I was hoping anyone can help me. Please

you gotta removed the background, then mask it. These are just masking layers. tons of tuts on YT for this type of stuff.

Thats clipping mask, either click in between two layers to make the top one only show up INSIDE of the bottoms selection or press CTRL + ALT + G

There's an Indian bloke on YouTube called PixImperfect whose videos focus a lot of selections. If masks still confuse you, watch him or anyone talking about selections and masks work. He explains well.