Spartan-419 are you serious? The landfall was amazing. Seriously amazing. From a realism point of view, even the way they did the armor is realistic in a practical sense.
The We are ODST was cool, but the CGI was disappointing, Weta did a MUCH MUCH MUCH more amazing job on landfall, and I wouldnt want anyone else to sort out the stuff for the Halo movie. I would be disappointed if the people who did the ODST video did the movie anyways, as I cant see it being as awesome.