They are showing highlights of Duffy's set at Wakestock tonight at 9pm on S4C. For those of us outside Wales you can get this channel on Sky freesat (and maybe freeview, right?)
Thanks to "Anon" for letting me know about this!
If you miss it then click this link to see when you can catch it again. It seems to be repeated on Sat 19th and Wed 23rd July.