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I commend you on your video, because of your detailed links and your logical approach to put out honest information.

Comet 209P/LINEAR ( 23:30 ) Uploaded on Mar 2, 2014 STEREO image astrometric solution: http://nova.astrometry.net/user_image… Astrometrically solved 209P/LINEAR image: http://nova.astrometry.net/user_image… 209P/LINEAR Orbital solutions and ephemeris using amateur data: http://dropcanvas.com/00pj5

But I do have a few points to discuss with you about it.
First, instead of being "Unlisted", you should do some minor changes to make it "List-able", and add links to your programs that show the orbital models you display.

I want to know more about the Orbit Reconstruction, Simulation and Analysis software and how to use it.
How does it compare to Stellarium and to SkySafari Pro ?
Why did you choose it over the others ?

Pasquale Tricarico, Ph.D., Senior Scientist of the Planetary Science Institute is someone I 'd like to know more about.

I get the impression you're him.

The overall impression I got from your video is that you're stating

"No threat, no danger from Comet 209P/Linear.
Just a new "meteor shower" to view, that's all."

But, at 16 minutes and 54 seconds into of your 23:30 unlisted video, your "OpenGL viewer: 209P Back to 1803", clearly shows

M01D: 0.256LD Time: 1810 Dec 4 00:00:00 TDT Central Object: Sun Observer Position: Free

So Comet 209P/Linear's orbital distance from Earth's orbital plane is 0.256LD Lunar Distance, from it's 1810 Dec 4 orbit.
A lunar distance (LD) is 384,400 km (238,900 miles) and 0.256LD LD is only 61,158.5 miles.

Now to you question "WHERE the "2.1 Million Miles Wide" came from".
BPEarthWatch addressed it Feb 16, 2014 at from 3:09 to 4:33 of the 5:22 video where he states:

" The Earth is moving at 67,000 miles per hour. It will take 30 hours to pass thru Comet Linear's Debris Field. The Earth travels 1.6 million miles per day. This meals the Debris Field is 2 Million Miles Wide. It's actually 2 Million 10 Thousand Milers Wide, to get it right down and accurate. That's a wide debris field, guys. ... Time inside the thickest part of the debris field will be 8-12 hours. "

I think it came from Figure 2 on page 5 of Quanshi Ye and Paul A. Wiegert .pdf and is a compilation of ALL 209P/Linear's Orbital debris trails.

My guess on his statement about "an arc" it that he's talking about when Comet 209P/Linear starts its downward turn on the outbound leg of its orbit.

Where you address "Comet Lovejoy vs Comet 209P/Linear" and the mistaken identity, you convinced me, with your presentation and the detailed links you presented.

Where you present the width of Come 209P/Linear as a diameter of only 4,000 miles, you again convinced me.
BUT, you appear to be talking about just ONE orbit's width, and NOT ALL the accumulated orbital debris fields left behind from Comet 209P/Linear, that we're going to enter May 24, 2014.

That's where, I think, he gets the "2.1 million miles wide" figure.

You addressed Comet IRAS–Araki–Alcock (formal designation C/1983 H1, formerly 1983 VII) making a closer approach to Earth, almost twice as close as 209p, was okay.
But there are several different estimates of 209P's closeness with Earth's orbit, however, your XORSA model is the most believable I've seen so far.
I enjoyed reading:

Lexell's Comet

55P/Tempel-Tuttle

That was an interesting read.
But your
"Comet 209P/Linear's orbital distance from Earth's orbital plane is 0.256LD Lunar Distance, from it's 1810 Dec 4 orbit."
is only 61,158.5 miles and that's closer.

Your presentation of 209P interacting with Jupiter's orbit around Jan 2010, bringing it closer to Earth, was informing.

Overall, I have more respect for you, but your questioning of BPEarthWatch's motives seems strange.
I believe he's sincere, but I didn't know people made money from YouTube.com,

http://socialblade.com/youtube/user/(name) is one I want to remember.

Overall, you did a good job with your presentation.
Just don't fault people for trying to make money in their retirement years.

serve the people as a "Watchman on the wall".