I use and recommend a lot of free Softwares, but ALWAYS try to avoid codec packs, because it fill the system with a lot of garbage, and some of them replace codecs that Premiere and other Softwares install.
In fact I have some problems installink K-Lite and some others, then Premiere cannot load certain video movies with codecs that K-Lite have replaced!!!. So beware with that!
Mi rule of thumb is to install ONLY the codecs that I need, and only these.
The vast majority of players come with internal decoders, so not need to install codecs.