Thanks to OnlyJazzHQ for the You Tube
California Here I Come was written by Al Jolson, Buddy DeSylva,, and Joseph Meyer in 1921 and recorded by Jolson in 1924. This performance by Fats Waller is presumably from a radio broadcast, I can’t find a listing for it as a 78 RPM record. No sourcing from the poster, so let me guess: Either a Yacht Club radio broadcast or a V-Disc for Armed Forces Radio. I’ll update this post if I find further details.
Fats at the piano as usual makes it sound so easy. Another tiny 2 and a half minute gem from the portly one.