Here's Scott Manley
His speculation on what happened to the booster matched what some where saying in chats.
He then moves on to Starship itself. He notices there was a puff followed by LOX level dropping faster than the CH4
Also of note is both debris trails were picked by radar.
And also also of note is video from Puerto Rico supposedly showing debris burning up in the atmosphere
Starship & Superheavy Become The Biggest Rocket In Space.... Before Exploding
https://www.youtube.com/watch?v=hF2C7xE9Mj4