on my laptop (specs wise - consider steam deck non oled, but worse graphics performance, 1080p screen (IPS)) - 5.3-6 Wh for 2x speed playback. for full hd playback 6-7 Wh. Idle power is much higher though 4.5 Wh, on my old laptop, video power consumption consumed similar power, but idle power was close to 2.5-3 Wh (in terms of specs, it had halve the number of cores, and a tn panel)
on my laptop (specs wise - consider steam deck non oled, but worse graphics performance, 1080p screen (IPS)) - 5.3-6 Wh for 2x speed playback. for full hd playback 6-7 Wh. Idle power is much higher though 4.5 Wh, on my old laptop, video power consumption consumed similar power, but idle power was close to 2.5-3 Wh (in terms of specs, it had halve the number of cores, and a tn panel)