This whole thread has been one big speculation as what the answer should be to that big row of question marks.
The first of May as it came to be celebrated in parts of the globe originated from the US of A,
so a genuine USA invention.
Socialist counties or better to say countries "on their way to socialism" copied it gladly later.
Now when the weather is right people use it to have a grill "na majówkę".
Could be an excellent grilled steak with a likewise superb sauce and grilled veggies.
Yummy to your tummy
.
Do not worry the streaming updates will continue in the mean time.
polonus