Creating an info Video from provided .png, .jpg and .pptx files

I require two MP4 videos developed - part one and part two. The content of the two videos will be originated from approximately 80% PDF and powerpoint slides [including a couple of JPEGs], which I will provide. The content of the remaining 20% will be within the remit of the videos' creator. The purpose of the videos are to raise awareness in our office about a previous and ongoing event - it will need to be professional, however as previously alluded to, creative freedom will be given to the videos' creator. Each of the two videos shall not exceed 150 seconds in length - so 300 seconds total. I envisage nine transitions/parts to video 1 and ten transition/parts to video 2 - the videos' creator can add others as he/she deems fit. Thank you!