These are velvet foot aka winter mushrooms. If you really want to be sure do a spore print and if the spores are white then you are good to cook them. Though given that they are growing in winter and have all the features of winter mushrooms I don't think you need to worry about these being something poisonous.
Yeah, it's probably this one
https://cs.wikipedia.org/wiki/Pen%C3%ADzovka_sametonoh%C3%A1
https://en.wikipedia.org/wiki/Enokitake
Yeah definitely those.