Is it a commercial short film, or a long-form advertisement? Dunno. Don’t care. Whatever it is, the “Hotel Hell Vacation” mini-movie not only sees the couple of Clark and Ellen Griswold of the “National Lampoon’s Vacation” franchise (played, as always, by Chevy Chase and Beverly D’Angelo) but the HomeAway commercial reminds us of some of our better (or is that worse?) moments abroad. The leaking tub at the W Hotel in Union Square. The broken mirrors in that Philly hotel. Oh, and who could forget Mr. Right?