Would appreciate some enlightenment/advice from you
technophiles out there.

I bought this "all-around" DVD player which also has a USB
port that supposedly plays (as per the manual) Mp3 audio and MPEG4 videos.

I thought it would be cool if I could play the YouTube videos I downloaded and converted to Mp4 format on the TV. I converted the YouTube .flv
files to Mp4 so I can play them on my celphone.

But when I inserted my flash drive (containing various JPEG, Mp3, and
Mp4 files) in to the DVD Player's USB Port, only the JPEG and Mp3 audio
files could be played but no MP4 videos!

So is MPEG4 different from Mp4 that's why my DVD player can't
"recognize" the files? Or do I have to tweak the DVD Player setup
in some way?

Would appreciate some help, for not being able to play the videos
is really quite frustrating!