[Notimetolooz]

Oh, you are trying to confuse us by rotating the scan!

The brighter bands are probably due to the scans not being uniform, the lines are crowded together at the top and bottom making it look brighter. That means the scan shapes are not straight ramps.

The scan frequencies could be far off. No video signal is making it to the CRT.
If you had a decent oscilloscope you would be able to figure the approximate frequencies and the waveshapes of the sweep. If the frequencies of the sweep were not very far off and the video was making it to the screen a pattern generator would work instead.

That Leader would be fine (assuming that particular unit is working right).
If you get it one of the first things to do is try it on a working analog TV (a color set would be fine).
That will test it out and get you familiar with how it is used.