MuscleWiki is a fitness app with a comprehensive exercise library that includes videos and written instructions for over 2000 exercises. With a simple and intuitive bodymap that guides you to exercises for a particular muscle, you can simplify your workout with exercises suitable for beginners, intermediate and advanced fitness enthusiasts.
Might be a good site, but this makes me wonder how well researched it is. This exercise is bad for your shoulders and can cause all kinds of joint and nerve problems long-term: https://musclewiki.com/barbell/male/traps/barbell-upright-row