what you are asking for does not exist. as far as i know, you can only embed video directly on the timeline. that is not recommended though, and i am not even sure if current versions (CS3 and CS4) still support that. at any rate, it is not a good pracice, nor practical, except maybe for a REAL small video.
to play a video ( flv ) from a video player ( either a Component, or strictly AS created ), the flv is always external to the SWF.
i am not all that familiar with CMS , but why would that be a problem for your CMS, to handle the video(flv) file ?
1) great. using Sorenson. but as you found out ...
2) this is the beauty and magic of Flash. create WHATEVER player and interface you can dream up ...... OR .. use a Component and Component Skin
3) you can't explore a flv file. i assume you meant a fla ? if so, there are plenty of tutorials and examples out there ( many on this very site ! ) that providde you with the means. if you are having trouble locating one, let us know and we can direct you to one, or post a simple one
4) that AS doesn't exist, as you can't have the flv 'contained' in the swf. once again, if you need to see how to create a SWF with a video player referencing your FLV , see the tutorials, or ask and we can help with that.
hope that helps. sorry if it is not the satisfying answer you were hoping for. feel free to post requests for specific problems or issues, as these will be tackled a lot easier