How to use a capture from a rewrite rule inside a php file (like single.php)?

Question

Nicolais Tip got me on the right track; Here is the working code:

// add a query_var first
add_filter("query_vars", function($vars) {
    $vars[] = "myTheme_podcast_time";
    return $vars;   
});

add_filter("rewrite_rules_array", function($rules) {

    $newRules = array();
    $newRules["(.*)/time/([\d|\:]+)s?$"] = 'index.php?name=$matches[1]&myTheme_podcast_time=$matches[2]'; 

    $merged = array_merge($newRules, $rules);
    return $merged;

});

And then in single.php:

$time = get_query_var("myTheme_podcast_time");

// do stuff