A video sender comprising: a video creator configured to create video; a receiver configured to receive, from a video receiver , specific information indicating a first mode or a second mode; a sender configured to send content information to the video receiver, the content information representing an attribute of the video created by the video creator ; and a transition minimized differential signaling, TMDS, encoder configured to convert the video created by the video creator into video with 4:2:0 Y, Cb, Cr format and 60 fps when the received specific information indicates the first mode and transmit the video thus converted to the video receiver via a digital interface; and into video with 4:2:2 Y, Cb, Cr format and 30 fps or 4:4:4 Y, Cb, Cr format and 30 fps when the received specific information indicates the second mode and transmit the video thus converted to the video receiver via the digital interface; wherein the digital interface includes an High-Definition Multimedia Interface, HDMI, cable comprising a first transmission channel, a second transmission channel, and a third transmission channel, wherein if the specific information indicates the first mode, the TMDS encoder is configured to transmit the video with the 4:2:0 Y, Cb, Cr format comprising four pieces of luminance information and two pieces of color difference information for four pixels adjacent to each other in the video, such that the two pieces of color difference information transmitted by the TMDS encoder are assigned only to the first transmission channel, the four pieces of luminance information transmitted by the TMDS encoder are assigned only to the second transmission channel and the third transmission channel, and two of the four pieces of luminance information and one of the two pieces of color difference information transmitted by the TMDS encoder are transmitted at the same clock timing. a video creator configured to create video; a receiver configured to receive, from a video receiver , specific information indicating a first mode or a second mode; a sender configured to send content information to the video receiver, the content information representing an attribute of the video created by the video creator ; and a transition minimized differential signaling, TMDS, encoder configured to convert the video created by the video creator into video with 4:2:0 Y, Cb, Cr format and 60 fps when the received specific information indicates the first mode and transmit the video thus converted to the video receiver via a digital interface; and into video with 4:2:2 Y, Cb, Cr format and 30 fps or 4:4:4 Y, Cb, Cr format and 30 fps when the received specific information indicates the second mode and transmit the video thus converted to the video receiver via the digital interface; wherein the digital interface includes an High-Definition Multimedia Interface, HDMI, cable comprising a first transmission channel, a second transmission channel, and a third transmission channel, wherein if the specific information indicates the first mode, the TMDS encoder is configured to transmit the video with the 4:2:0 Y, Cb, Cr format comprising four pieces of luminance information and two pieces of color difference information for four pixels adjacent to each other in the video, such that the two pieces of color difference information transmitted by the TMDS encoder are assigned only to the first transmission channel, the four pieces of luminance information transmitted by the TMDS encoder are assigned only to the second transmission channel and the third transmission channel, and two of the four pieces of luminance information and one of the two pieces of color difference information transmitted by the TMDS encoder are transmitted at the same clock timing. <EOS>