These videos (both visible today) were made remotely, with Timothy Lord at one end in Austin, TX, and Jim Zemlin at the other end in Tokyo, Japan. Their sound quality suffers from the distance involved, but they are generally intelligible -- and, of course, you can always choose to read the transcript instead of watching the videos.
For Windows many solutions claim to exist, usually in form of massive antivirus suites. What about GNU/Linux? Or Android? Several solutions rely on setting up a proxy with a whitelist of sites, or similar, but I'm afraid this approach can make internet unusable, or otherwise be easy to bypass. Have you any experiences or suggestions? Do you think software solutions are only a part of the solution, provided children can learn hacking tricks better than us, and if so, what other 'human' techniques are most effective?