Translation courtesy Mrs WHBM
(who doesn't really know aviation terms)
On approach: "65 [presumably the callsign of the aircraft], watch speed, watch rate of descent, align [to the runway ?], align more"
When the porpoising starts: "Hold it level.....hold it level.....HOLD IT LEVEL..."
When stopped: "OK, taxi back ......... no, shut it down".
Presumably the voice is from the ground, not an instructor on the aircraft.