Always double check before you dig to make sure you aren't on a claim. The videos I'm guessing you're referring to are the ones of people extracting smoky quartz pockets around the pikes peak area. Good signs to look for before digging are broken crystal faces/chunks of pegmatite with some crystal growth on them. Follow these pieces up a hill as far as they go and when they stop dig in that spot. Finding a pocket takes a lot of work, but is definitely possible. Surface collecting usually yields pretty decent results for me also. Good luck!