You can use implay(): https://www.mathworks.com/help/releases/R2020b/images/ref/implay.html to play video.
You can also make your own GUI as shown in following code
v = VideoReader('xylophone.mp4');
figure();
ax = axes();
frame = readFrame(v);
im_frame = imshow(frame, 'Parent', ax);
while hasFrame(v)
im_frame.CData = readFrame(v);
drawnow
end
