You haven't mentioned the program you are using but It sounds like you are using Crazytalk 8.
In Crazytalk 8 you would normally expect a project to take just a few minutes at most rather than hours to export to video. I have personally never encountered a project that took that long to output. Have you actually tried waiting because it may not actually take as long as you think it will.
If you have waited and it is taking an unusually long time to render, please can you tell us your full system specs including your graphic card.