I happened to have a friend that is into lifting, but also my work has an on-site gym with a dedicated fitness instructor. But had those circumstances not been available, I would have considered hiring a personal trainer for a few sessions. Another option is to see what your local city might offer in terms of continuing education, since that often also includes time with a fitness expert.
That said, while it's true that a video won't properly describe the full motion for an exercise, it should be the case that watching a video should avoid all the major pitfalls that might cause injury. If there's a risk that you'll injure yourself, it might be because you're trying too much weight too early.
If needed, you can even try an exercise with little or no weight, to make sure your form is dialed in. Also, do not underestimate the utility of setting up a camera on a tripod to record your form. It's something which is fairly easy to do, and more people can quickly review a video and give tips, even online.