What this video covers
The clip reframes the question from whether you are breathing spores to how many.
Outdoor air normally carries a few hundred to a couple of thousand spores per cubic meter, and that is the baseline. Indoor air is meant to sit at or below it, because a building should be filtering and diluting rather than generating.
The takeaway
Presence of spores is normal and not a finding. An indoor count that exceeds outdoors is the signal, because it means something inside the building is producing them.
Read the full written guide: Mold Air Quality Testing.