Tkinter cant open file up using askopenfilenames
<p>I am using </p>

<pre><code>root = Tk()
root.geometry('1000x500')
root.title("Permutations and Combinations Lesson")
app = Questionnaire(root)
root.mainloop() 
filez = tkFileDialog.askopenfilenames(parent=root,title='PandC.mp4')
print(filez)
</code></pre>

<p>but I cannot get the video to open up and play, does anyone know the reason for this? thanks</p>