Clipless Pedals - What are they and do we need them?

Sharing a few thoughts on clipless pedals; what are they, what are the supposed benefits and what's been my experience using them. This video is probably aimed more at the newer rider trying to get a range of views and make an informed decision about whether they should take a look at clipless pedals. That being said I'd be really interested to hear your views if you've been riding clipless (recently started or for years) - what got you started with these types of pedals and how do you find them; do you find it makes a big difference to your riding? Happy cycling folks!