Corporate videos generally don't need that many effects or transitions. No matter which level of equipment you choose, when dealing with digital video it's always important to carefully select the hard disk you'll be using. If the disk isn't fast enough to write all the data sent to it, your video will have gaps in it, known as dropped frames. To ensure smooth playback, this data must be written on the hard disk without any pauses. Because of drastic improvements in hard disk speed in the past year, however, nearly any stock disk drive will be fast enough to handle the throughput of compressed video.
Uncompressed video is another story, however.