Can the NSeries phone play WMV/AVI/MPG/DAT/MPEG4/VCD/DVD video files?
No – you need third party software to play most video types. SmartMovie is one example for XviD AVI files and it offers full screen landscape viewing too. For MPG/WMV and many other video files, there’s CorePlayer. The only ones that you can play without additional software are MP4, 3GP and RealMedia(RM) files, all of which separate encoders are required. Nokia Video Manager is able to convert to MP4 at no charge. You can also try MediaCoder, another free utility. You can also try Handbrake to convert DVDs to MP4. SUPER is free as well.