I'm less concerned about the "looping" than I am the potential USB hurdles themselves. I suspect it will work just dandy within the limitations of the USB stick itself and the USB HDTV connection.
Some may be limited to FAT32/4GB. Others may support 4:2:2 JPG images and not 4:4:4. If the OP is using actual "PP" media, he should verify the export formats in his software to those supported by the HDTV/USB stick.