I found a decent kickboxing heavybag workout worth sharing. It's not for kicking anyone's ass but you'll definitely feel it after 30 minutes. It's got fast combos (kicks and punches) After some trial and error I'd recommend putting in the earbuds at the gym
www.youtube.com/watch?v=mWS60KLLxjw
www.youtube.com/watch?v=mWS60KLLxjw