Thousands gather for France's annual tech rendez vous

Vivatech 2018 took place in Paris from May 24 to 26 and Tech 24 went along to check it out. This year, there was a special focus on tech startups in Africa. Dhananjay Khadilkar tries out various gadgets in Test 24 and we interview the founder of blockchain cryptoplatform "Ethereum" on just how crucial blockchain technology will be to the decentralised internet of the future.