JWPlayer shortcode vs. code provided

First of all, I want to thank you for the excellent video tutorials and forum support S2member provides. This is the first membership site I am creating for a client and after a lot of research of features and reviews I went with S2member and I am so happy I did. I cannot believe what you provide for a free plugin – especially the complexity of streaming protected videos. Thank you!

After a lot of review of the AmazonS3/Cloudfront/JW Player information, I was able to successfully stream videos on the site. However I am still confused on what the difference is from using the code you provide to stream the video and inserting the JW Player with an External URL. Both work but I am looking for an easy way to hand this site over to my client and to paste and fiddle with the code every time may scare them. I would much rather use the JW Player shortcode if there is no difference. If the page the video(s) is on is already restricted does it matter?

Plus what is the best way, if the code is indeed better, to add multiple videos on a page or post? Is it just a matter of copying and pasting the code several times?

Thanks in advance for your help