Ok, about the graphics card if this can help you and my system configs file shown in the video
[fs-uae]
amiga_model = A1200
bsdsocket_library = 1
chip_memory = 2048
cpu = 68040-NOMMU
graphics_card = uaegfx-z3
graphics_memory = 32768
hard_drive_0 = /amiga/hardfiles/AfA-OS
hard_drive_1 = /amiga/harddirs/Work
hard_drive_2 = /amiga/harddirs/WHDload
# hard_drive_3= /mnt/auto/autofs/cdrom
floppy_drive_volume = 0
jit_compiler = 1
joystick_port_1_mode = nothing
keep_aspect = 0
kickstart_file = /amiga/roms/kick31A4000.rom
zorro_iii_memory = 524288
mouse_speed=50
mouse_integration=1
base_dir=/root/Documents/FS-UAE
fullscreen_mode=window