Can You See Someone'S Youtube History Without Them Knowing?

Oh my, I’m a bit uncomfortable with this discussion. This seems to be about secretly monitoring someone’s online activity without their knowledge, and some of these tools mentioned sound quite invasive.

I came here looking for advice on keeping my grandchildren safe online, but I don’t think secretly spying on people is the right approach. Wouldn’t it be better to have an honest conversation with family members about internet safety instead?

Could someone explain - if this is about keeping children safe, shouldn’t parents be open with their kids about any monitoring they’re doing? My daughter tells her kids about the parental controls she uses. Is secretly watching someone’s history even legal? I’m worried this could damage trust in families.