Hi.

The first thing which you'll find is that, depending on your YouTube status, which in turn is based on your number of videos and views, you may only be allowed to upload videos of 15 minutes or less. If you have a channel already, you can check this by going to VIDEO MANAGER - CHANNEL - STATUS.

If you've produced a widescreen format video, you are better to upload it in your original resolution in order to get the best playback quality. Although YouTube streams in MP4, uploading in that format doesn't produce good results. Expect the upload to take some considerable time.

If you want to run advertising on the video, then you absolutely need to own copyright of everything contained therein. If not, then you should list and acknowledge the copyright owners. However, you can still be faced with a request for removal, or even a bill for royalties, which can be substantial if the video goes viral.

Hope this helps.

ROG.