Years ago when I studied Spanish, we were taught to pronounce “ll” as if it were the “y” in young or year. My Argentinan friend pronounced it as if it were the “j” in just.
In the Rocket lessons, I'm hearing it pronounced more like “j” than “y”. SO -
Either pronounciation has drifted over the last 50+ years
or
What I was taught was an over-simplification
or ???