I don’t like VLC anyway, I had a problem with it
deinterlacing with IPTV. I like SMPlayer a lot, but it doesn’t work as well as on Windows - everything freezes after a few minutes of playback and no “repeat” settings help. That’s why my question about your favorite player, preferably light and functional.
Welcome to the club 
Try mpv, but I don’t know if it does what you want. At least it doesn’t have the bitchiness of vlc.
Quite a few people use Hypnotix.
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How to install (with what command) Hypnotix?
It’s in the AUR, so you could use yay
yay hypnotix
or any other aur helper of your preference.
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What is the difference between hypnotix and hypnotix-git?
Typically the -git version of a package is the bleeding edge version (=has all the latest changes) of the same (non-git) package.
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Kodi is too heavy for you?
I would be more interested in a lightweight mpv frontend that supports iptv / m3u
Rather than asking people to guess an application that matches your specific tastes, check this wiki page: https://wiki.archlinux.org/index.php/List_of_applications
Maybe mpv with something like this?
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Technically, the OP was asking “what application do you use?” rather than “give me an application I like”. 
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I can recommend celluloid.
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