I agree with the other commentators, it is bad. Actually, worse then that. It is harmful, since it portrays history in a completely slanted and erroneous way. Even as a joke it is bad. There are historical errors and impossibilities in this nonsense.

However, it has a redeeming quality, however not as a movie, but as an audio-CD. The music is superb, and highly enjoyable. This music should have been used in a far more valuable film-production.

Well, this is what happens, if one writes-produces a movie without his heart, mind and soul in it.

The producers would have, or could have been successful if their judgment is correct, their choice of adaptation accurate and their expectation more realistic.

So, don't look at it, just listen.