Czech republic? Czechia?

For you, guys, knowing not much about my country (I AM MORAVIAN!!!)

https://www.youtube.com/watch?v=-kaF6SnSEo8&feature=youtu.be&fbclid=IwAR1u4EiWUc2HOlB7bca8IC_bBgIHuXFUpvlgrBlxCU1j-HGcbY4rKLsv2_c