Blender really isn't just a 3d modeling tool, it's a bit of a hodge podge. It does things well though. It gets the name "blender" for its video compositor features, comparable to AfterEffects.

For video editing, kdenlive is the state of the art on linux. Here's a guide written by a professional video editor who uses only free software http://slackermedia.info/

I've heard about https://kdenlive.org/ but never used it for real myself.

Using Kdenlive regularly and it does simple jobs very well and is really stable nowadays. It's certainly nothing like Adobe Premiere but it works.

Lightworks? It is pretty much the best software i've used for that and it runs even more stable on linux than windows

Depends on your industry; there are bigger players in film than Adobe. LightWorks is quite accessible, and Autodesk has lots of software for you to throw your money at.

Black Magic Davinci Resolve is fantastic on windows but costs money on Linux. For professional video editing I was very impressed after having tried kdenlive, sony vegas (and premiere long ago).