I've opened about 6 VLC instances (I could open more) to your server using Tester 01 & 02 accounts.
After the first 5 I had to use the Tester02 account, so you've setup the connection limit right :p
None seem to be glitching so your connection appears to be holding up..
I'm guessing you're running this via the QNAP NAS you have running on port 80..
Went up to 9 now xD
!hog2.png!
EDIT** Been playing them for a while now, the only one that appeared to go extremely low birate was Somali Cable..