http://www.techradar.com/news/new-nintendo-switch-update-40-adds-some-genuinely-useful-features

The Nintendo Switch has a brand new software update and it’s one that adds features users have been hoping to see for quite a while now. Well, kind of – though they’re features that have been asked for, they’re not being implemented in quite as full a way as some may hope. 

A significant new feature is the ability to capture video. To use this you simply have to hold down the capture button rather than give it a single press as you would to take a screenshot. Once you’ve captured your clip you’ll be able to trim the start or the end and then post it to Facebook or Twitter for all the world to see.