Here is a guide that show you how to upload PowerPoint to Youtube.
Step1:
Click the 'New Task' button to add PowerPoint file(s), also you can drag and drop PowerPoint file(s) into source list from Windows Explorer.

Step2:
Click the 'FLV video' button in output video formats list to choose FLV format.

Step3:
Click the 'Convert' button to start converting.

Step4:
Upload the output FLV video to Youtube.
Related Tutorials:
1. How to convert and burn PowerPoint to DVD?
Featured Products
PowerPoint to Youtube Free PowerPoint Video Converter