The video gives a basic monitor-tuning tip, but it exaggerates how much these settings can change a display.
Claim-by-claim breakdown
Accurate (87% confidence): Setting a monitor’s gamma to 2.4 is a valid adjustment for darker viewing environments or video work. Display calibration references commonly use gamma 2.4 for dark viewing environments and video work; sRGB is typically 2.2, so the “best” choice depends on content and room lighting.
Accurate (86% confidence): Setting Black Boost to zero will reduce lifted shadows and keep dark areas darker on monitors that have this feature. Acer describes Black Boost as adjusting black level / shadow brightness, with higher levels brightening dark areas. Lowering it can therefore make dark tones less washed out.
Misleading (93% confidence): These settings will make any monitor look like OLED. OLED technology produces black by turning pixels off, while LCDs still rely on a backlight. Settings can improve appearance, but they do not make an LCD behave like OLED.