About the video:

What is the Nichiren perspective is on ego or no self. Is the aim to fully dissolve the personal self? Is it an illusion we have an ego? Are we to upgrade the self or see it as non-existent? I’ve never fully understood this topic.
This is an interesting question and illustrates the confusion that can develop when we have heard the ideas of another form of Buddhism and don’t know how they equate to our own practice. Your question is relating to the Theraveda or the Tibetian form of... Buddhism.