The first two videos show children & adults she is safe I don't worry about her biting or being unstable in strange situations. I have two daughters 3 & 6 they are playing fetch in one of the last videos the dog was only a problem for a couple of months biting pants and whatever else but left the kids alone quite quickly I would come down hard & fast also she would stop when they yelled she was better with them than us just a puppy with prey drive no big deal she is safe with kids and visitors just a bit energetic. They need plenty of socialization I keep her loose in my front yard and lake lot so she can meet people & pets with the border enforced by my voice she doesn't stray I can go to store without worry. She will bark up a storm in the house at anything going by if I let her and she has stopped flyer and meter readers who try to try to come from the side but is fine when they come from the front if she's outside. I take her anywhere kids soccer games, the beach, the dogpark without worry she would make a great therapy dog she's friendly and outgoing just energetic would need exercise socialization and rules most Fila de Sao Miguel dogs could do therapy work or anything else if raised properly very sound stable dogs that need a leader. They may be more of a handful than most breeds but most of the labs i've seen lately have been unstable with dog aggression so ultimately it's up to you to raise the dog you want regardless of breed.