this might help explain thing for you
the format that iView uses is F4V, which is just flash video (.flv) container with MPEG4 and AAC streams, however for whatever reason they are named .MP4, the files can be very easily remuxed (ie streams copyed out of the flv and placed into .mp4 containers) by using the package below (all the downloaders just copy the file from the server, so this applies to all iview downloaders)
http://rapidshare.com/files/436601834/Remux.zip
http://www.megaupload.com/?d=CD4CPJ0H
[Instructions and info edited from one of my earlier posts]
This is a couple of bat files using ffmpeg (all of 3 must be in the same directory, with the mp4s) and another zip with a cmd program called recycle.exe which needs to be put in the windows->System32 folder
the remux.bat converts whatever file you drop n' drop on it into an mp4 with directly copied streams ie no reencoding (also works with plus7 flv files as they are also F4V), while the feeder.bat will go through every .mp4 file in the folder and will run them through the remux.bat.
the recycle.exe is required to send the originals to the recycle bin rather than deleting them outright in case some thing goes wrong.
lastly I suggest you get mediainfo as it is a nice quick acid test on whether the remux was successful as if it does not show data for all segments (container, video and audio) then its a dud and need to restore the original and go from there.
Obviously this is a windows based solution, and will be little use to you if you're running a Apple or Linux machine.
[end or repost]
After REmux you should end up with compatible MP4 files
If you end up with a dud let me know and I'll help you fix it with Frhed