My family & I are travelling LHR - SFO on UA in economy +. Could anyone tell me if I can stream videos to phone/ipad? I've read several sites, and I'm reading conflicting info on this... Also, are there power outlets?

(seatguru, routehappy are conflicting as is united.com)

Travelling with 18 month old & 3.5 yo so any extra 'entertainment' a bonus!