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, WhatsApp links, and writing reports. I'm thinking of rebooting my nice small BlackBerry and putting a smallish mini-laptop in my bag. Any thoughts? Peter

BlackBerry lost its premier position in the market - when its phones were used by everyone from Paris Hilton to then US president Barack Obama - but you can still buy BlackBerry phones. The company licensed its name and technology to China's TCL Communication Technology Holdings Limited (TCT), which sells phones under the TCL, BlackBerry Mobile and Alcatel brand names. It also makes TV sets, soundbars, headphones, air conditioners and dehumidifiers. (The BlackBerry name has also been used by Optiemus Infracom, selling phones as BlackBerry Mobile India, and BB Merah Putih, which briefly served the Indonesian market.)