the command to flash twrp recovery image from bootloader is:
fastboot -i 0x2b4c flash recovery twrp.img
you need to download twrp.img before flash it, and also put it into the same directory (and with the same filename) that you are executing the command.
In the screenshot, the first command fails due to twrp.img isn't found.
I did it, I just tried different combinations, as well changing the name of the file to twrpz1.img
None of the options works.