Since it's just a text file, you can open it in any text editor to delete channels you don't want or rename them for better organization.
Remember: M3U is just a format. Legit services exist; so do shady ones. Stay informed. Since it's just a text file, you can
Unlike some proprietary streaming boxes, M3U lists don't care what hardware you use; they just need a compatible app. Since it's just a text file