Q&A for How to Add Transitions to Powerpoint

Select "Insert" from the top toolbar. On the far right there will be an option to insert a "movie." Click that and then locate your video file.

No, you cannot make your own transitions, but you can use animations instead.

Have your question and answer be in separate text boxes, then you can add fade in and out animations to each text box to have them appear or disappear with your mouse click. It is helpful to add your animations to text boxes and then bring up the animation pane to help sort things out.

Select the textbox or picture you want to go animation and select the animation. Press present and it's finished.