Can I convert a YouTube video to another format and edit it?
Answer
It depends on the license.
License information is found in the description box of the video. Click "Show More" and scroll to the bottom of the box.
If the video you want to convert has a "Creative Commons Attribution (reuse allowed)" license, you can reuse (edit) the video as long as you cite/attribute the creator.
Videos with a Standard YouTube License cannot be changed or converted without permission from the creator.
Be careful, make sure that the video you want to use was uploaded by the creator or owner. Anyone has the ability to upload a video and put any license they wish on it, even if it isn't their original content.