Some popular selections with discussion so far:

Bluetooth Headphone Jacking: A Key to Your Phone [video]

https://news.ycombinator.com/item?id=46453204

Hacking Washing Machines [video]

https://news.ycombinator.com/item?id=46428496

Escaping containment: A security analysis of FreeBSD jails [video]

https://news.ycombinator.com/item?id=46436828

All my Deutschlandtickets gone: Fraud at an industrial scale [video]

https://news.ycombinator.com/item?id=46411930