The Hidden Meaning of Christmas?

This video purports to show that stories of the birth and death of Jesus Christ were based on astronomical events. I was not convinced.

The first tip-off is when the narrator says "Sirius...on Dec 24th aligns with the three brightest stars in Orion's belt." Stars don't line up with each other on particular days of the year. They are fixed (for all intents and purposes). There's nothing special about Dec 24th. Also, the stars in Orion's Belt don't point directly to Sirius, as the video implies.

The narrator then says that Orion's Belt and Sirius point to the rising sun on that day. This is just not true. The image below shows the relation of these bodies at sunrise on Dec 24, 300AD (around the time when the Christmas myth was created) at Jerusalem. The image is not substantially different on Dec 25, or even in the year 2009.

Sirius and Orion's Belt on the right clearly point nowhere near the Sun on the left.

The other main inaccuracy of the video (which is in fact its entire point) is that on Dec 25 the Sun rises in Crux, the Southern Cross. Apart from the fact that Crux is hard to see from the Northern Hemisphere, the image shows that the Sun is nowhere near the Southern Cross (center) at that time.