Everything Kuger said... good info. I am a true believer in full camo, headnet, gloves, play the wind, and move every minute of a set like you have a deer 5 yards from you all the time because you will get picked off.
Don't expect them to always cross the field like in the videos... If they can, they will run a edge in cover too. I have shot several 20 yards (and less) from me sneaking slowly along in the underbrush. Had one get 5-6 feet from me before I knew he was there, but it was some thick stuff. Nope, didn't get him, he was gone when I turned my head.
I prefer going to a coyote set up by barely peaking a crest/hill and quietly setting up to call a bottom, field, draw, etc. I like semi-tall cover behind me to break me up and sit brushy fence lines a lot. I do not like walking out 50-75 yards in the open to set a remote call or decoy because I have called too many dogs on me 20-30 seconds after hitting the mouth call and I am sure I would have blowed them out of there had I went bouncing out in the open to set stuff up, just my preference. Like Kuger said, don't blow hard right away and sound like a 200# rabbit. I use electronics but rarely, I personally like the feeling of blowing the call, coaxing them in and dumping them as close as I can.
Remember a coyote has a better GPS system than you do... when you set off a call he has you narrowed to a very finite area before you ever spot him. I also don't like to over call once I have one headed my way just for that reason, I don't want to be pegged anymore than he/she already has me. Mouth squeaks where you pinch your lips together and suck in (kinda like kiss calling your dog) will pull one in from 50 yards or more. I use these when one is hung close but I have no shot yet or when deer hunting (bow) and I spot a coyote and no call is handy or buried in my backpack.
I also believe a 15 minute set is plenty but I also have capitalized on my hunting day by taking my shotgun, number 6's, crow call and decoys. Set up, call coyotes for 15 and if nothing, stab decoys in the ground, set off the crow call, go hide then dump a few... move a 1/4 mile and do it again. Makes for a fun day. I have even thrown a coyote out on the ground then lined crows up around it and then hit the crow call, makes for a more real set. If you have never called crows, they are close to coyotes (maybe smarter). You get one (maybe two) shots at calling them in, they will pick you off in a heartbeat and you have to move after killing a few.
And don't give up. Remember the videos are showing all the sets where they got shots or kills... not the dozens they didn't. Some days are gold, other days are chit. And best of all, have fun and take someone that's never done it. I enjoy csalling in a yote and watching someone else get it as much as I like pulling the trigger myself. It will make their day.