PASSENGER AIRCRAFT FAILS TO TAKEOFF! BOEING 737 NEAR TAIL STRIKE & STALL ON TAKEOFF

What was this pilot thinking? Watch as they rotate at a very slow speed causing the aircraft’s nose to lift off the ground but not generating enough lift to become fully airborne, & then shortly after stalling they continue to accelerate down the runway to rotate at a faster speed. I have no idea as to why this happened, but some theories could include an incorrect flap setting, the setting of incorrect V speeds or an incorrect trim? But in this day and age, surely error mistakes like these shouldn’t be a