Ammos not cheap at $15/USD a pop but it certainly outperforms the M4 it's a bit showmanship skit but has some information from the troops who trialed the new weapons system.
The SP 6.8mm ammo operates at 80,000 psi but easily defeats Lv 4 body armor and as said in the skit may take on light skinned vehicles like the BMP.
Anyway he appears to be an ex-serviceman, thanks for your service.
Is that pile of ammo at 10:18 .303 British or 7.62 X 54R? Either way it's funny how when talking about the latest and greatest ammunition of the 21st century he's displaying ammunition from the 19th Century.