A video signal processing method, wherein the method comprises: obtaining a first linear luminance signal (Ys), wherein the first linear luminance signal is obtained based on a first linear red green blue, RGB, signal (RsGsBs) corresponding to a to-be-processed video signal; wherein the first linear luminance signal is a high dynamic range, HDR, signal, wherein the to-be-processed video signal is a hybrid log-gamma, HLG, signal, and the obtaining a first linear luminance signal comprises: performing color space conversion on the HLG signal to obtain a first non-linear RGB signal (R'sG'sB's), wherein the HLG signal is obtained after HLG encoding is performed on a linear scene light signal, wherein the HLG signal is in a Luma-Chroma-Chroma, YCC, space; converting the first non-linear RGB signal (R'sG'sB's) into the first linear RGB signal (RsGsBs) based on an HLG inverse optical-electro transfer function; performing calculation based on primary color signals of the first linear RGB signal (RsGsBs) to obtain the first linear luminance signal (Ys); converting (502, 1003, 1004), by using system gamma, the first linear luminance signal (Ys) from the scene light signal to a display light luminance signal (Yd), and converting the display light luminance signal (Yd) into a first non-linear luminance signal (NL_Yd); performing (503, 1005) piecewise luminance mapping on the first non-linear luminance signal (NL_Yd) to obtain a second non-linear luminance signal (NL_Yt); converting (504, 1006) the second non-linear luminance signal (NL_Yt) into a second linear luminance signal (Yt); calculating (505, 1007) a luminance gain between the second linear luminance signal (Yt) and the first linear luminance signal (Ys); and obtaining (506, 1008), based on a product of the luminance gain and the first linear RGB signal (RsGsBs), an RGB display signal (RtGtBt) corresponding to the to-be-processed video signal, wherein the RGB display signal is a standard dynamic range, SDR, signal, wherein the RGB display signal is used for display by a display device. obtaining a first linear luminance signal (Ys), wherein the first linear luminance signal is obtained based on a first linear red green blue, RGB, signal (RsGsBs) corresponding to a to-be-processed video signal; wherein the first linear luminance signal is a high dynamic range, HDR, signal, wherein the to-be-processed video signal is a hybrid log-gamma, HLG, signal, and the obtaining a first linear luminance signal comprises: performing color space conversion on the HLG signal to obtain a first non-linear RGB signal (R'sG'sB's), wherein the HLG signal is obtained after HLG encoding is performed on a linear scene light signal, wherein the HLG signal is in a Luma-Chroma-Chroma, YCC, space; converting the first non-linear RGB signal (R'sG'sB's) into the first linear RGB signal (RsGsBs) based on an HLG inverse optical-electro transfer function; performing calculation based on primary color signals of the first linear RGB signal (RsGsBs) to obtain the first linear luminance signal (Ys); performing color space conversion on the HLG signal to obtain a first non-linear RGB signal (R'sG'sB's), wherein the HLG signal is obtained after HLG encoding is performed on a linear scene light signal, wherein the HLG signal is in a Luma-Chroma-Chroma, YCC, space; converting the first non-linear RGB signal (R'sG'sB's) into the first linear RGB signal (RsGsBs) based on an HLG inverse optical-electro transfer function; performing calculation based on primary color signals of the first linear RGB signal (RsGsBs) to obtain the first linear luminance signal (Ys); converting (502, 1003, 1004), by using system gamma, the first linear luminance signal (Ys) from the scene light signal to a display light luminance signal (Yd), and converting the display light luminance signal (Yd) into a first non-linear luminance signal (NL_Yd); performing (503, 1005) piecewise luminance mapping on the first non-linear luminance signal (NL_Yd) to obtain a second non-linear luminance signal (NL_Yt); converting (504, 1006) the second non-linear luminance signal (NL_Yt) into a second linear luminance signal (Yt); calculating (505, 1007) a luminance gain between the second linear luminance signal (Yt) and the first linear luminance signal (Ys); and obtaining (506, 1008), based on a product of the luminance gain and the first linear RGB signal (RsGsBs), an RGB display signal (RtGtBt) corresponding to the to-be-processed video signal, wherein the RGB display signal is a standard dynamic range, SDR, signal, wherein the RGB display signal is used for display by a display device.