What do you mean by "I couldn't place:" ?
In your home directory there should exist a subdirectory "Downloads".
I suggest that you download the file to this dir.
Open terminal/console and enter on the command line:
Have you installed wget? If not, do:
sudo dnf install wget
On the command line do:
wget -c https://www.quirksmode.org/html5/videos/big_buck_bunny.mp4
"-c" tells wget to download the file to the actual/current directory.
I choose this video to test your installation. Because it should open with VLC and VLC should play it.
Open your file browser (dolphin, nautilus, whatever, ...)
Then go to <your home directory>/Downloads.
It's a directory in your Home directory where downloads use to be saved.
Find the downloaded file big_buck_bunny.mp4, right click, "open with", choose VLC.
Does the downloaded file (downloaded to your harddisk) play ?
I'm NOT talking about your browser, whether your browser plays it.
You already verified your browser installation on https://www.quirksmode.org/html5/tests/video.html
On this page ONLY your browser is tested.
NOT the applications on your computer.
Therefor I want you to test the application installation on your computer by downloading a file to your harddisk and trying to open/play it.
Does the downloaded file (downloaded to your harddisk) play with VLC?
When you right click on that file in your filebrowser what does the right click menu show?
It should list you some possible apps to open the file with.