There is a structure underneath it, and once you see it you stop needing to memorise sequences because you can build one.
Almost every session, in most styles, follows the same shape:
Arrive. A few minutes of stillness or simple breathing. You are not warming up yet; you are noticing what today is like.
Warm the spine gently. Small movements in every direction, forward, back, side, twist. Cat and cow, gentle side bends, easy twists. This is the part people skip and it is what makes everything afterwards available.
Build heat. Something repetitive and flowing. Sun salutations are the standard answer and any repeated sequence works.
The main work. Whatever the session is actually for, standing poses, hips, backbends, balance. Usually one theme rather than five.
Counter and unwind. Something that undoes the main work. Twists after backbends, forward folds after almost anything.
Rest. Non-negotiable, and the first thing dropped when short of time.
That is the whole grammar. Once you have it, a session becomes: pick a theme, choose three or four poses for the middle, and fill the rest from the shape. Videos have been giving you this every time without naming it, which is why the transition feels bigger than it is.