The LTT video[1] is also from their ShortCircuit channel, their unboxing/ first-impressions channel and should not be confused with their review content.
I personally watched the 54 minute in-depth overview from My Life in Gaming[2], and it was clear that LTT/ShortCircuit overlooked or were incorrect in some parts of their initial impressions.
EDIT: Specially in regards to the display, they spent no time at all to experiment with the 3 built-in GBA display modes; if they used the modes that replicated the original GBA or GBA SP (AGS-101) screens, they would've had a more color-equivalent appearance. MLiG in their video spent 10+ minutes on display modes alone.