function for reading the labels.
function [files, labels] = TrainingDataFiles(dataFolder)
fileExtension = ".mp4";
listing = dir(fullfile(dataFolder, "*", "*" + fileExtension));
numObservations = numel(listing);
files = strings(numObservations,1);
labels = cell(numObservations,1);
for i = 1:numObservations
name = listing(i).name;
folder = listing(i).folder;
[~,labels{i}] = fileparts(folder);
files(i) = fullfile(folder,name);
end
labels = categorical(labels);
end
