I have used AP film retrievers, all plastic blades, for many, many years in my minilab and always found them to work perfectly. They do wear out with heavy use. The hard plastic end beside the film cassette will break off but they will still work. Only when the blades become damaged or torn is it time to replace the picker.
The video is good but one point I thought it missed was that if you turn the film spindle before you insert the blades, it makes it easier to insert the blades, and then you can move the first slider all the way up and in. The more the picker's tongue is inside the cassette, the better grip it will have on the film.