Does this give more features and things like that?
Isn't it just enough with this command? It installed smplayer and gave me "mpv Media Player".
sudo apt install smplayer
Maybe it's updated now since your tutorial was made, I'm not sure 
Does this give more features and things like that?
Isn't it just enough with this command? It installed smplayer and gave me "mpv Media Player".
sudo apt install smplayer
Maybe it's updated now since your tutorial was made, I'm not sure