At first glance your post had me concerned, since there is a big difference between your gig ratings (percentage of positive reviews,) your gig ranking in search and your cancellation rating (singular.) At first I thought you meant that something visible would change, like mutually cancelled gigs being reviewed after cancellation or a change in something visible to buyers.
After watching the video, this actually looks like it is part of of a well-improved analytics panel that gives a seller a lot more data, more like it would if you had your own website and were using analytics plug-ins or Google tools. It seems positive to me. I don’t see anywhere in the video or the CS message that it says you are negatively affected by mutual cancellations. It looks like it affects your analytics panel and even breaks down types of cancellations for you so you can see how you are doing.
To my knowledge, if you have forced cancellations by CS or cancellations that are not mutual as the buyer doesn’t respond in time, that can affect your search ranking. That is important. Mutual cancellations still do not affect your search ranking in any way that I can see. If you find out otherwise, please update.