More static exercises rather than dynamic. Like yoga poses, planks, you could do very slow high intensity focused dynamic moves. Pushups and crunches aren't very noisy but on those it's your breathing that would be noisiest.
Iyengar Course One 1st and 2nd Week 11:40
Lower Back Yogi *E 14:10
Sun Salutation Yoga 7:45
30 Top Sun Stretches 12:00
Morning Healing Yoga 12:55