Who are we and how do we know Wally? (Welcome Home theory) (speed paint)

I couldn't help but brainstorm not 1, not 2, but three theories for who we are (the viewers) and how we play into the whole "lost show" plot. Supposedly we've seen the show before... But how??? 0:00 intro 0:28 the YOU in this universe 3:55 you own the tapes 5:41 it never left the network I love the last theory so stick through to the end, you can do that for me right? This is a Welcome Home theory