What is the method of sujud al-sahw (the prostration for forgetfulness), and when is it obligatory?

The questioner : Any question. And women. Your presence. This question is from a Libyan brother who says that he claims to have written it for the fourth time, and if Allah wills, review it at home, and if it is suitable for publication, we will publish it next night, if Allah wills. The questioner says: I am often forgetful in prayer, and sometimes I feel that I have left out a pillar of the prayer. What is obligatory for me, and when is sujud al-sahw (the prostration for forgetfulness) obligatory for me? I ask you, Honorable Shaykh, to clarify to me the method of sujud al-sahw (the prostration for forgetfulness)?

The Shaykh : This question will be, if Allah wills, the subject of our lesson next night, because it requires detail and the mention of evidence. I hope you will remind me next night so that it may be, if Allah wills, the lesson that precedes the questions. The brothers say that the time has ended, and if the time ends, we will postpone it, if Allah wills, to next night,