Not sure of the answer, but with my Panasonic hard drive recorder (that also has a Blu-ray recording to disk function) any attached USB drives must be registered by the unit (it's a menu command). Registered devices allow recording and playback, but recordings are restricted to playback on the hard drive unit itself. The recordings can't be played back on another device - even if it's the same model Panasonic.
Of course, that may not be relevant in your case (just providing a bit of background to my situation). But perhaps the USB flash drive needs to be registered on your Samsung player before it will correctly recognize the video files - just guessing! Registering on the Panasonic can only be achieved by attaching a drive with no content.
Please note that your original post is incomplete. You say "Samsung provided the following information: And this:". It peters out at that point as no other information is provided. Perhaps a forum moderator has removed some of the content (Samsung v Apple ??).
Have Samsung given you any worthwhile information regarding formats that will play on the unit? Perhaps not, given you've posted your question here!
Note that posts here get buried pretty quickly if no responses are provided early in the piece. It doesn't necessarily mean that no-one knows the answer.
I will google your model number to see what I can find (but I'm sure you've already tried that).
The playback formats for your Samsung are: MPEG-2, MPEG-4, DivX™ HD, WMV - that's according to Samsung's USA website.
One review I looked at mentioned this:
"Other useful features include an enhanced graphic user interface and USB play back of multimedia files like WMA, AVI, MP3, JPEG, DivX HD, MKV and MP4. Unlike many players, the BD-D7500 has 1 GB of local storage for downloading any BD-Live content locate on certain Blu-ray discs. So there is no need for using an external USB flash drive, unless you want more storage space."
So it would appear that MPEG-4 (and others) should work properly. Sorry I can't think of any other solutions.
I tried to insert text from the chat I had with Samsung and while it looked like it took apparantly it didn't.
So, when I asked about file formats they replied that "*.mpg/*.*.ts/*.tp/*.trp, vro,3gp, mp4, wmv, asf, *.mkv, *..avi are the supported video files." The avi listing led me to give avi a try but that only got the file on the menu but it won't play. The second question about the codec error got this response, "" This Blu-ray player can play AVI files which are having Divx 3.11/4,XVID, MPEG4 SP/ASP, H.264 BP/MP/HP video codecs". I don't understand the difference between file format, e.g., AVI and codec codes, e.g., MPEG4 SP. I don't see these specific encodings in the iMove lists.
Thanks for the help.