What's the best mini-laptop for YouTube and writing reports?

Peter wants a mini-laptop to go with his old BlackBerry phone. What are his options? I’m old-school now at 71, but I’m still designing and working as a consultant. I had nothing but BlackBerry smartphones for years. Then it all went wrong. My boring Samsung J-something does most things but I miss my BlackBerry. I found an old one in a drawer, and it fits nicely in my pocket when off out. However, when I’m in a coffee place or relaxing, I’d like a big screen for YouTube, W