What software should be used for presentations?

Question

Presentations

They asked me to help organize software in one university.
The problem is that every n-th number of weeks there is a presentation. A bunch of specialists gather, each of whom brings his own motley media for presentation. Someone prefers video files of different formats. Microsoft fans come with *.pptx, Fedora fans always bring *.odp, students don't forget to stuff their creations into *.pdf. In the midst of all this, various music is played by order of the authors. When someone comes on stage, a certain type of music is played. When people simply applaud a good speaker, another type is played. Sometimes a gift is given to someone. Plays the third type of music (jolly pop).
The funny thing is that the system is built on S-Video cables and you need to watch out for switching from the computer to the Blu-ray player.
Now all this is done manually by two miracles. A couple of guys memorized a bunch of shortcuts, when a presentation is going, they receive materials, put them in a folder, call them names, number them, and then open them in different programs and manually drag these programs to the second screen, scrolling media in front of the audience. Since all this causes a lot of dissatisfaction with the quality, the guys began to train a lot, and now they can open files in a split second and switch them almost painlessly so that people hardly notice. But the joke is that everything is messed up on these two. Recently, one was sick and the other went on vacation - the presentations were of disgusting quality.
I was asked to sort it all out with good software, in which you can collect this motleyness into one heap, and then, clicking a button, the operator will start showing this and that, interspersed with the logo of the university.
In addition to the requirements:
Sometimes presentations are brought in at the last second
. Must be able to view and listen to all files before showing.
There should be plugins for strange files, the more the better.
There should be a way to run from one computer and be happy.
Everything should be free.
As what I would like to receive, this amazing video by Scott Hanselman was shown. How good is this as an example? By showing different utensils from different sources, the person conducting the presentation is quite inconsistent and constantly switching sources, but at the same time, it does not look stupid.
I started googling and found out that the main supplier of such software to the market is the motley American churches. 0_o.
In an attempt to download the next portion of the Bible to the people, various programs have been developed, such as
Open LP
Easy worship and so on.
In addition to the fact that the price of such programs sometimes bites, the programs themselves leave much to be desired. The lack of PDF support, focusing solely on showing pieces of the bible and singing hymns, does not allow the use of such software at the university.
But I don't think that this software is used at MS conferences.
Surely there are software and hardware systems that automate the process.
Does anyone have experience in this area? Isn't it all that bad? What software should be used?

Answer 1

slidedog.com stumbled upon by accident