A video device to generate analog video signals to a plurality of display devices comprises a video processing chip, a plurality of video output interface circuits and a plurality of detection circuits. The drive current passes through a conversion circuit, and an amplifier circuit outputs a current detection result by amplifying the output voltage of the conversion circuit. The outer ring has a first shoulder, a second shoulder and a race surface therebetween to receive the balls. A hydraulic strut resists a pivoting movement of the arm in relation to the fixed support. In the reading process, because the optimum cut-off frequency and boost value are used for a specific read head, the processed electrical signal more accurately represents the digital data recorded on the magnetic tape. The loading device comprises a plurality of supporting elements, supporting a panel.