Are you sure the android file system is the issue?
forum.xda-developers.com/showthread.php?t=1823746
"Internal storage is ext4, which has a filesize limit of 16 TB. I believe it will be enough for all Infinity users The 4GB limit is under FAT16 and FAT32 only, which on your device you won't see anywhere besides the (micro)SD(HC) card!
If someone here really thinks your internal storage could be formatted FAT32, read about file permissions under Linux for the starters
And just to make sure, I've just copied a 5.46 GB file from full-size SDHC card in the dock to my internal storage (/sdcard/) with an average speed of 15 MB/s without experiencing any problems (within the tablet, so if you experience problems with USB transfers, consider it a problem with Windows handling MTP on your device or a similar issue).
This whole thread actually spreads disinformation. Better try to make sure, if you are unsure.
BTW, don't go with NTFS under Android in general and under .26 Infinity firmware in particular, it will give you trouble at some point on any device you connect to it. Just format your external cards to exFAT and don't even try to touch internal...
As to watching big .mkv files, try BSPlayer Free, it has played my 15 GB 1080p mkv files very smoothly. You can see more about apps for the Infinity in my apps (sticky) therad."