Okay, so there aren't that many videos to have come out of gamescom today. Maybe only millions. Okay, maybe only twelve.
If I had to recommend a couple of the videos, I'd suggest you take a gander at Remember Me (looks like a sci-fi Uncharted/Mirror's Edge progeny) and Crysis 3 (few vs. many asymmetric multiplayer). The full list is below.
gamescom: Capcom announces new IP Remember Me
gamescom: Street Fighter X Tekken Vita trailers are here
gamescom: First look at Army of Two: The Devil's Cartel
gamescom: Battlefield 3: Premium Edition announced
gamescom: Medal of Honor: Warfighter multiplayer trailer
gamescom: Here's Crysis 3's new Hunter mode
gamescom: Dead Space 3 limited edition detailed
gamescom: Get all the cars in Need for Speed Most Wanted
gamescom: SimCity closed beta sign-ups are open
gamescom: AC3 naval warfare trailer is wet and wonderful
gamescom: Another Dark Souls: Prepare to Die Ed. trailer
gamescom: This Star Trek trailer reintroduces the Gorn