Can't delete videos

Just bought a new iPad mini. When I was looking at the amount of space left on the device I noticed that it said I had 4 videos installed, except I didn't install any videos. On my computer the videos are there, but I did not tell iTunes to put them on my iPad. Where it says "sync" is Unchecked. To save space I am trying to remove them, but I can't find a way to do that. When I go to each video there is a cloud with an arrow pointing down, so it looks like they are not downloaded yet, except for the fact that they do play, so maybe they're streaming? Not sure, but I'd like to remove them from the iPad, while keeping them on the computer. How do I do this? Thanks.