There is at least one episode of The Hudson Brothers Razzle Dazzle Show available on YouTube, and here it is. However, it isn't a first-run episode. A network promo narrated by Danny Dark (Super Friends) plugs the 1975-6 season, with the addition of Far Out Space Nuts, Ghost Busters, & Isis. The Hudsons were moved to Sundays for the '75-76 season, which would end the series' run.
Keep an eye open for announcer-series regular Peter Cullen. If you've ever wondered what the future voice of Optimus Prime and other classic 80's characters actually looked like back in the day, well.....! Also, if you wonder why NBC & ESPN have used the "coaches' clicker" so much, it's actually a gimmick that began with Andy Williams' primetime show back in the day, which, like the Hudsons' shows (primetime and daytime) were produced by Chris Bearde.
To think that this series came about because the network wanted to keep the Hudsons around after their summer 1974 series had run its course, having ended 10 days before Razzle Dazzle premiered.