re: "Live in Concert" In this neck of the woods one of the popular events is the "Pink Floyd Laser Light Show." They rent out a place and play Pink Floyd CDs over the PA while having a live laser show. So while the audience is listening to Pink Floyd, they are definitely not In Concert.
Also, it is not uncommon for a venue to simulcast an event as it happens on their big screen TV. So while you could go see, say, Tina Turner In Concert, it is not Live at that venue. So at least around here there is a difference between "In Concert" and "Live, in Concert"