What this video covers
Bleach is the default choice and the clip explains why it underperforms on most surfaces.
It works on non-porous material like tile and glass, where the colony really is only on the surface. On porous material the water in the bleach soaks in while the active ingredient largely stays on top, so roots survive and get watered.
The takeaway
Match the product to the surface. Bleach on tile is reasonable. Bleach on drywall, timber or grout tends to remove the colour while leaving the colony.
Read the full written guide: Does Bleach Kill Mold?.