Having only owned horses for a few years I had to learn how to train when I bought a then 3 year old. ( I was told he was five, but they fibbed! )
It was either that, or sell him after only owning him for two weeks, I was having such a time.
I got busy and bought all the C Anderson dvd's and read and watched every RFDTV show there was. There wasn't as many trainers on RFD 3 years ago.
I did incorporate a trainer to help me canter him since I was too new at that and to help show me which leg aids to use when.
But, then it was all me.
This horse is now 6 and is the best trained horse I have. I am pretty proud of all we have accomplished.
It does take commitment, consistency, and patience.
I lacked the last at times, it can be frustrating, but, soon learned that when I was getting frustrated, to just stop everything I was doing, take a breath and SMILE at my horse! Until I felt the frustration leave. I wouldn't do anything else with him till I was calm. Then I would do something he knew by heart to help him and me stay relaxed.
It didn't take long for me to realize that if I was frustrated, so was my horse! Horses don't want to frustrate you, they are really trying to do what you want. It's up to us to find a way to make them understand without putting too much pressure on them.
If you can remember that, and to always stay safe, you will create a bond with your horse that nobody can take away!
So yes, you can train a horse pretty good just by using dvd's. But, if you can use a trainer, all the better!