I stopped caring about algorithm changes some years ago and don't want to ever look at them again. They are so often and so many that trying to adapt to all of them is doing more harm than good. At the end trying to follow or to game the algorithm is a grey area that shall not be of concern to a video creator. I care about making the best videos now, not about the algorithm changes, keywords, tags, retention time, traffic sources, etc. In fact my best performing videos have pretty minimal descriptions and less than usual amount of tags.