Hahaha the video is very funny the first one. I love jazz, here I was singing la cucaracha in Spanish.
I really enjoyed the second video even though I don't understand Russian. I was born in Kiev in 1980, but I don't know... I never learned. My parents do speak a little, but since they don't practice it, they're also rusty. They were studying there and I was born there.
I could not watch the third video because it is blocked for this geographical area.