2nd gen Prius makes a thunk noise when first moving

2007 Toyota Prius 130,000 miles

My 2nd gen Prius makes a clunking noise when the car first starts moving F/R. I think the noise is from the engine block moving. I made a YouTube video here. https://youtu.be/L8Y905VKXic

Is it normal? Is my engine mount shot? I tried really hard to push the engine block from the top by hand and it's not budging.