try different things:
-run BIOS and FIRMWARE updates too
-try another layout:
start AM > press TAB key > Displays > your_Display > Layout : try_here_another_layout
-try different video decoder settings:
start AM > press TAB key > General > Video Decoder
-run attract with another user account
-try to start attract-console.exe
-right mouse button on attract.exe > properties > compatibility > check : run as administrator > OK
-resize or change video codec of one video with video-decoding software (there exists different threads with resolution, working codecs, ...)