i was struggling to hear it that well on the video, but if its compressor stall then you probably are risking turbo damage...
If its just "tishhhh" ing like an atmo valve would then fine, but if its making a fluttery "cha cha cha cha" noise then its compressor stall, likely due to the dump valve not opening.
If its the latter, go spend £20 at your local VAG dealer on a 710N dumpvalve and fit that.
A nice meaty turbo like a T3 can handle the stresses of compressor stall, the K03 is quite a modern thing with lightweight thin shaft etc and especially at high boost your risking blowing it to bits!