As promised last week, we have added videos of all the main storyline missions to our gallery (please note that due to copyright issues, the videos don't contain any music or cutscenes). In addition, we have also added videos showing how to complete each of the 50 stunt jumps in GTA IV, which together contribute 2.5% towards 100% completion. We plan to add more videos in the future, so be sure to check back on a regular basis.
And on behalf of everyone at GTANET I'd like to wish all our visitors a happy new year!
Link: Grand Theft Auto IV Video Gallery.