Any help would be appreciated.

The sooner you switch to pQuery, HTML::TreeBuilder::LibXML/HTML::TreeBuilder::XPath ... the better off you'll be

#!/usr/bin/perl --
use strict;
use warnings;

my $fafafa = <<'__FAFAFA__';
<iframe width="560" height="349" src="http://www.youtube.com/embed/8lG
+m40pxw" frameborder="0" allowfullscreen></iframe>
__FAFAFA__

print $fafafa;

$fafafa =~ s~<iframe([^>]+)>~'<iframe '.Fafafa("$1");~gie;

print $fafafa;
    
sub Fafafa {
    my %kava;
    my @bool;
    while( $_[0] =~ m{
        \G
        (?:
            ( [^'"\s=]+ )        # $1, key
            \s* = \s*
            " ( [^"]+)" # $2, val
        )
        |
        ( [^'"\s=]+ )           # single
        |
        \s
    }gxs
    ){
        no warnings 'uninitialized';
        print "1($1)2($2)3($3)\n";
        if( $3 ){
            push @bool, $3
        } elsif( $1 ) {
            $kava{$1}=$2;
        }
        
    }
    
    use DDS; Dump(\%kava);
    return join ' ', @bool, map { qq'$_="$kava{$_}"' } keys %kava;
}

__END__
[download]

<iframe width="560" height="349" src="http://www.youtube.com/embed/8lG
+m40pxw" frameborder="0" allowfullscreen></iframe>
1()2()3()
1(width)2(560)3()
1()2()3()
1(height)2(349)3()
1()2()3()
1(src)2(http://www.youtube.com/embed/8lGm40pxw)3()
1()2()3()
1(frameborder)2(0)3()
1()2()3()
1()2()3(allowfullscreen)
$HASH1 = {
           frameborder
                  => 0,
           height => 349,
           src    => 'http://www.youtube.com/embed/8lGm40pxw',
           width  => 560
         };
<iframe allowfullscreen width="560" frameborder="0" src="http://www.yo
+utube.com/embed/8lGm40pxw" height="349"</iframe>
[download]