Can I charge my MacBook Pro 2015 without using MagSafe 2 power port? I have a MacBook Pro (Retina, 15-inch, Mid 2015). Now after three years of use, the charger isn't responding to being plugged in. I tried to reset the SMC by holding down the left side shift control option and the power key but no luck.

Is it possible to charge my MacBook using Thunderbolt 2 ports or USB 3 ports? I have seen some videos on Youtube people charging their device using these but I am not sure.
It is neither possible nor advisable to charge your MacBook Pro using Thunderbolt or USB ports.

It is possible that either your MagSafe 2 port or the charging adapter is damaged. Please stop plugging in the charger if you spot burnt marks on either one of them. It’s recommended that you get your MacBook Pro inspected by an authorized Apple technician. You may be eligible for free service and replacement if you are covered under AppleCare.