In tons of videos, (random YouTube example) the wood transforms into something totally different with a finish.
I can't for the life of me get anything even remotely as nice as those things. At best I get a small change in colour, but never have I been able to "buff out" the wood grain so much. What are these people using and what is the trick to get it right? Is the secret in the coating or in the wood (or both)? How much of this is editing and they're actually applying multiple layers? Should I use a piece of cloth or a brush? How much should I use? I have so many questions, but in the end I just want to have results like that. I'm looking for basically the "top 5 steps to get started and get reasonably good results".
Clarifications: I've tried different finishes sold in my local DIY store, none come even close. Results I've gotten so far range from barely visible over brown smudges to essentially paint that covers everything up. I'm looking for this "buffing" effect, where the wood looks professional, the grain shows through, and it's an even coating. I'm not looking for a specific protection or something, right now my focus is on visuals.
I'm a beginner, got a few tools but not yet a complete shop and mostly experience on practical things like an outdoor enclosure for my cats and stuff.
I've worked mostly with rough wood, I've tried sanding it with whatever sand paper I happened to have, I've tried polishing it (bought a polishing set for my grinder). I've tried an oil and a varnish from the local DIY store, both picked for colour without any understanding of ingredients. Yes, I'm a beginner. :-)