[How-to] How to allow running multiple copies of Totem player

I was looking for a solution to this problem for a long time and finally found it :))
I do not argue that this method is the simplest.

So.
Go to the properties of the video file and add to the list of applications with which you can open this type of file, the following command:


And then select the item you just created from the list:


By doing this operation with each type of video file, we will be able to run multiple copies of Totem at the same time.