This video is the continuation of my previous video on Twin paradox
ua-cam.com/video/Qc3j63GgHSw/v-deo.html
In this video an expression for time dilation due to acceleration is derived using the Equivalence Principle of General Relativity. It matches the expression derived in the above video derived using only Special Relativity. The result can also be interpreted as time dilation caused by uniform acceleration due to gravity.