Need Tips On Powerpoint

This Sunday, our family will be hosting the annual family reunion. My mom asked me if I can prepare a video presentation that will feature the photos of last year's reunion. I said I will try my best. I know how to do a presentation in Powepoint, but I have no idea how can I convert it into a video file. Anyone who can give tips? 

Major house cleaning is definitely the first thing our whole family will do starting tonight. I heard my dad thinking out loud about where to hire chairs and tables and his plans for the exterior lighting in the garden. Long night and Saturday for us, I guess. 

It's Zyrene's birthday on the 25th. I can't believe our bunso is turning 17. I asked him if he's getting tired of our yearly party for the neighborhood kids, since he's not getting any younger. But he said he enjoys it and it has been a family tradition. I wonder how many kids will attend this year...