This bad? Do I need to replace the soil?

I'm guessing this is a fungus. Can I just scoop it out or do I need to replace all the soil? I do have holes in the bottom of the pot for water drainage. I water about once every 1.5 to 2 weeks. Link to vid of fungus.

https://preview.redd.it/jbthyhvaogye1.jpg?width=1848&format=pjpg&auto=webp&s=2e4b3133f9a67054b7a35de2160db624f2382468

https://preview.redd.it/09575hvaogye1.jpg?width=1848&format=pjpg&auto=webp&s=800229e98f39f55dc0f6d2ba9aa6591820bdf146