What this video covers
The first few minutes after finding mold matter, mostly because of what people do wrong in them.
The clip runs through the opening steps: do not touch or disturb it, because agitating a colony releases spores into the air you are standing in. Photograph it before anything changes, since that documentation is what insurance and landlords will ask for later.
The takeaway
Resist the urge to start scrubbing immediately. Document first, contain second, and only then decide whether it is a job you can handle or one that needs a contractor.
Read the full written guide: How to Get Rid of Mold.