Very good video, probably the best/most accurate I've seen. A few notes:
1. Some of the parts in the video are aftermarket. The trigger, for example in some views shows an adjustable overtravel stop which is not characteristic of the factory part.
2. The video shows the firing pin still in the fully forward position at the end of rearward slide travel. In reality, in most cases, the abrupt stop as the slide hits the end of rearward travel will cause the firing pin to move back behind the breechface and firing pin safety.
3. This video accurately shows that the slide motion fully resets the trigger before significant compression of the firing pin spring occurs when there is nothing holding the trigger back. Many videos show the trigger resetting and the firing pin spring compressing at the same time. The trigger spring is a lot weaker than the firing pin spring so it loses the battle and the firing pin spring stays mostly uncompressed until the trigger stops moving forward. Of course, in most cases, the shooter's finger is still on the trigger so striker spring compression starts as soon as the trigger bar catches the firing pin lug as the slide comes back forward.
4. Although the video properly shows it, there is no mention of the second function of the connector "cam". That function is to help prevent out-of-battery firing. The cam disconnects the trigger from the connector until the slide is nearly fully into battery.