If you publish your PowerPoint slide show to the Web, others can easily view and share it. This is a great way to distribute information and keep track of who is viewing your presentation. Publishing your slide show video to YouTube is one of the easiest ways to host it online free of charge.
In PowerPoint, create a video file (.mp4 or .wmv file) from your slide show, as described in Turn your presentation into a video.
Go online to YouTube and sign in with your account.
In YouTube, click Upload and then select the file you want to upload. Enter a title, description, and any tags that you want to add to your movie.
Many additional settings are available for your movie. For example, you can select a category and choose whether you want your movie to be public or private. When you are done with settings, click Publish.
A private alternative for publishing a video
Microsoft Stream lets Office 365 business or education subscribers securely upload videos and share them with their colleagues. For details, see Save a video to Microsoft Stream.