Ha, ha—was that Jesse with a fro?
One of the great things about YouTube is that you can get a variety of takes on many things. The link above is to an interview with Leontyne Price, the great black opera singer, and her rendition of the same song.
Besides the fact that she can sing rings around "RenaMarie" the interview, where she expresses a wholly non-racialist account of singing prowess, her rendition and the lyrics superimposed on the flag, clearly show a commitment to God and to the US as "our native land."
This note on the author pretty clearly shows that HE was making a patriotic, not a black-nationalistic, statement:
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In 1900, he wrote the song "Lift Ev'ry Voice and Sing" on the occasion of Lincoln's birthday; the song which became immensely popular in the black community and became known as the "Negro National Anthem."
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That said, the mayor and the singer are clearly doofuses, at a minimum. It's a fine song, with its own fine tune, but it's not the national anthem of the US (and it doesn't sing well to that tune anyway).
As another poster noted, it could have been a fine intro to the SSB.