Of course there is the other can of worms of debating whether Y is a vowel or not. Also, “YouTube” sounds like it starts with “u” sound, despite starting with “y”.
Maybe English is just broken. Words starting with a long “u” sound make me question the rule - different than other long vowels…
Does one play “a ukulele” or “an ukulele”?
We need an umpire to make the call (;->