So what I'm looking to do is something like this which I figured out by creating two layers of video and audio, which for what I'm looking for would be a total of 64 and that would be too much and worse for my not so big monitor.

Already tried to Google for it but I can't find a tutorial to do a slideshow of videoclips, I'm quite new to this so yeah, I'd appreciate some guidance or pointing to forums/resource sites that help with this kind of stuff.