Broadcast quality FCP is largely independent of the source quality. It's a general rule of video and audio work that you begin with the highest possible quality, because you can save the final output in a lower resolution, as needed. Sony has a format called HDcam, with quality slightly higher than the highest HDTV standard. This means you can convert down to any of the lower quality levels. If your target is the Web, you can save progressive or hinted movies of the appropriate sizes.
Video is data organized in time.
A perfectly good Web frame rate is 12. In a word, weak. It's possible to create an editable text clip in FCP, but you're only allowed one line of text in a clip. To make multiple editable lines, make and format one, then clone it for the others. Another approach is the plug-in modules from Boris Graffiti , but both of these are modal, meaning you have to leave the FCP environment.