Although you can upload videos, webcam captures and photo slideshows to YouTube, you can't upload PowerPoint presentations when saved in their designated PPT file format. To overcome this problem, export your presentation as a video file from Microsoft PowerPoint. The software can export WMV or MP4 videos; YouTube supports both formats.
Exporting Video From PowerPoint
Open the presentation in PowerPoint and then record your slideshow, if you haven't already recorded it. PowerPoint creates animation timings and uses them in the final video when you record the slideshow.
Open the presentation in PowerPoint, click File, select Export and then click the Create a Video button to view all settings related to exporting to a video file.
Select the video resolution from the first drop-down box. The maximum and minimum resolutions are 1280x720 pixels and 424x240 pixels, respectively.
Select Use Recorded Timings and Narrations from the second drop-down box to use the recorded animation timings. You can select Don't Use Recorded Timings and Narrations if you want to use the default duration and if you don't need to include any recorded narration.
Type the default duration into the Seconds Spent On Each Slide field and then click the Create Video button. The default duration is used for slides that don't have animation timings, or for all slides if the Don't Use Recorded Timings and Narrations option is selected.
Type a name for the video into the File Name field and select the video format — WMV or MP4 — from the Save As Type box. Select the destination folder and click Save to create the video file.
Uploading to YouTube
Open YouTube, log in to your account and click the Upload button to open the YouTube Upload page.
Select the audience
Select the video you exported from PowerPoint and click the Open button to upload the video to YouTube.
Edit the information in the Basic Info tab and, if desired, change any advanced settings from the Advanced Settings tab. Click the Publish button to publish the video on YouTube.