I'm betting there is no such source.
Nothing is unedited, but there are several films out there that can be purchased on DVD at Amazon.
In Memoriam, NYC, 9/11/01 with Rudi Giuliani narrating is one of the best. It shows the most film of those who elected to leap rather than burn to death in the WTC of anything I've seen.
9/11 Filmmakers Commemorative Edition is documentary filmed by French brothers doing a documentary about a young firefighter in NYC that suddenly and unexpectedly turned into a 9/11 documentary. It has the only known footage from inside the WTC after the attacks, and a brotherhood of firefighters reality story to boot.
DC 9/11: Time of Crisis is a Showtime movie for television starring Timothy Bottoms as President Bush covers the first 10 days. It has the view from the White House, interspersing real TV footage. Despite the caricature portrayals of the principal figures in this docudrama, this film and its eerily appropriate soundtrack remains compelling for occasional reviewing and remembering.
9/11: Day of Disaster is just footage made by a private individual, of firefighters working outside the WTC and searching the Pile afterwards. Mainly of interest to structural engineers and firefighters, I think.
7 Days in September (footage taken by amateur New Yorkers of people in NYC 9/11-18) gets annoying after a while as it shows too many liberal New Yorkers who don't get it.