How can I sync the video along with the plot?

I have a code below to play the video and plot the data at the same time. But I am not able to sync the video properly with the graph.

How can I achieve this? I have also attached the raw excel file of the data I want to plot

%% Setup the subplots
ax1 = subplot(2,1,1); % For video
ax2 = subplot(2,1,2); % For pressure plot
%%% Setup VideoReader object
filename = 'slice1.avi';
v = VideoReader(filename);
frameratevideo=v.FrameRate;
nFrames = v.Duration*v.FrameRate; % Number of frames
% Display the first frame in the top subplot
vidFrame = readFrame(v);
v.CurrentTime = 16;
image(vidFrame, 'Parent', ax1);
ax1.Visible = 'off';
%%% Load the pressure data
t = ts; % your actual data
y = ys;
nDataPoints = length(t); % Number of data points
%step = round((nFrames/nDataPoints));
index = 1:0.44:nDataPoints;
i = 2;
% Diplay the plot corresponds to the first frame in the bottom subplot

h = plot(ax2,t(1:index(i)),y(1:index(i)),'-k');
    
% Fix the axes
ax2.XLim = [t(1) t(end)];
ax2.YLim = [min(y) max(y)];
%%% Animate
while hasFrame(v)
    pause(1/v.FrameRate);
   %pause(0.01)
    vidFrame = readFrame(v);
    image(vidFrame, 'Parent', ax1);
    ax1.Visible = 'off';
    
    i = i + 1;
    set(h,'YData',y(1:index(i)), 'XData', t(1:index(i)))
    
end

Answer 1

[Rajesh Ranjan]

Sujan, this is how I do it and it comes out synced.

v = VideoReader('testVideo.avi')

frameratevideo=v.FrameRate;

nFrames = v.Duration*v.FrameRate; % Number of frames

v.CurrentTime = 0.0;

x = 0:0.1:10

y = sin(x)

myVideo = VideoWriter('myVideoFile'); %open video file

myVideo.FrameRate = 5; %same as the input video

open(myVideo)

figure(1)

set(gcf,'Position',[100 100 800 400])

sub1=subplot(1,2,1)

sub2=subplot(1,2,2)

h2=animatedline('marker','o');

i=0;

%%% Animate

while hasFrame(v)

pause(1/v.FrameRate);

%pause(0.01)

vidFrame = readFrame(v);

image(vidFrame, 'Parent', sub1);

sub1.Visible = 'off';

i = i + 1;

addpoints(h2,x(i),y(i));

drawnow

%pause(0.1)

pause(1/v.FrameRate);

frame=getframe(gcf);

writeVideo(myVideo, frame);

% set(h,'YData',y(1:index(i)), 'XData', t(1:index(i)))

end

close(myVideo)