I would do as Paladin suggested, put values into a hash. To print, I would declare an array with the correct order that you want and then use that array in the main loop of a generalized print routine. Of course you might want to think about what happens if for some reason some desired key didn't wind up existing.

#!/usr/bin/perl
use strict;
use warnings;
$|=1;

# generated from the if regex statements instead of printing 
# right away
my %values = ( 'Luma Mode'    =>  'D45_PRED',
               'Chroma Mode'  =>  'UV_CFL_PRED',
               'CFL'          =>  5,
               'Luma Angle'   =>  3,
               'Chroma Angle' =>  0, );
               
               
my @order = ('Luma Mode', 'Luma Angle', 'Chroma Mode', 
              'CFL', 'Chroma Angle');               
             
foreach my $key (@order)
{
    print "$key:\t $values{$key}\n";
}

__END__
Luma Mode:       D45_PRED
Luma Angle:      3
Chroma Mode:     UV_CFL_PRED
CFL:     5
Chroma Angle:    0
[download]

Oh, I suppose that this code:

if ($line =~ /\s*APP>\sIntraAngleDelta\s:\s(\d+)\s(\d+)/i) {
   print "Luma Angle : $1\n"
}

if ($line =~ /\s*APP>\sIntraAngleDelta\s:\s(\d+)\s(\d+)/i) {
   print "Chroma Angle : $2\n"
}
[download]

Should be this??:

if ($line =~ /\s*APP>\sIntraAngleDelta\s:\s(\d+)\s(\d+)/i) {
   $values{'Luma Angle'} = $1;
   $values{'Chroma Angle'} = $2;
}
[download]