I've noticed this with my TraqMate also. Logged AFR not the same as what the display showed in the video.
Then the data logger probably hasn’t been configured correctly for that particular wideband, or the gauge is not correctly calibrated for the sensor. Or, if the logger data seems very erratic it may simply need better filtering & damping settings.
Keep in mind that both the logger and the dash gauge are simply voltmeters, and if correctly configured and functional both will read the same, even if that reading is wrong for some reason. Any decent wideband should include exact specs for volts to AFR (and/or Lambda), and some have multiple settings or can be set to a custom output using a PC. Any decent data logger provides the option to define a curve for a standard 0-5v input to translate that to AFR (or temp, or oil pressure, or whatever). So if you set the logger up per the specs for the wideband and it reads significantly different than the gauge that came with the sensor, then you would be well advised to figure out which is correct.