No this is completely off base. The Yah in Sanskrit is pronounced ""Yyyaaahh", like "Yehhh". (Like Kanye of YE but drawn out and HHhhh). You can check any Rigvedic Chanting Videos and see the verse with its syllables and its pronunciation.
The Website states the yay is pronounced like "Envay" and it states like "MUN - YAY - KAH". But the audio makes it "Munnn - eeennn-- khhhhaaah". It completely eliminates the "YAY".