You're not fixing problems already identified in responses above, starting with the first, urging you to test your open (and, by implication, your close, too)...
open(FILE, '>Test.mp4');
which would be better written as
open(my $file, '>Test.mp4') or die "Can't open for writing, $FILE", $!;
and you just might find using strict and warnings helpful

In reply to Re^5: Whats wrong with this code by ww
in thread Whats wrong with this code by mecrazycoder

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