Can I use 640 x 360 (16:9 ratio) FLVs in CP 5 with Flash Player 9

Can I use 640 x 360 (16:9 ratio) FLVs in CP 5 with Flash Player 9 (I can't test now, because I am using FP 10)

I think my client was given some bad information and I'm trying to clarify the correct facts.

I am working on a Captivate 5 project that uses a lot of FLV clips. These were prepared by someone else. The original video was edited to HDV format 1440 x 1080 (16:9)

Someone (a third party Adobe Sales Vendor) recommended to the video producer that in order to display in an optimal way in Captivate, that the FLVs should be transcoded to 640 x 480 (4:3) because of compatibility with "older Flash Player and bandwidth" considerations. However, that is not the case. Our audience can live with Flash Player 9+ and has reasonably good broadband.

The FLV clips are never shown full screen, but surrounded by typical text captions and images within a Captivate slide. So, I don't see why the video would not be perfectly fine at 16:9 (640 x 360.)

Further, the FLV (using Slide Video) would be resized to 400 x 300 to fit into the context of the surrounding captions on the slide.

So there some technical reason why I could not use 16:9 ratio at 640 x 360 having to do with older versions of the Flash Player?

Thanks as always.