Baby movements

I’ve seen videos of moms recording their babies moving like crazy in their bellies when they’re laying down on their backs. I tried to do with my baby but the baby only sits on my right side and kicks everynow and then. Is this normal? I get concerned at times since I feel baby is running out of room I’m 28 weeks was diagnosed with a unicornuate uterus but was told by a high risk doctor that my uterus is normal so not sure getting worried.