changing the arduino bootloader

From the videos I’ve seen on youtube everyone uses a arduino to code a arduino, im wondering is it posible to change the arduino bootloader to bootdrive without needing another arduino. … im using a arduino nano and i want to change the bootloader to bootdrive

To change the bootloader, you need a "device programmer." (The whole function of the bootloader is to prevent you from needing a device programmer to upload your other programs, but it can't upload itself.)
There are a bunch of device programmers you could use, OTHER than another Arduino, ranging from very cheap "AVR ASP" programmers to very expensive professional device programmers, but the "2nd Arduino" is the thing that an Arduino users is most likely to already have.

Ah i see... well i guess i can deal with it
... thank you for the imformation westfw