If you are looking to unlock your hip flexors but you lack ideas on how best to proceed or how best to go about it then there are several websites and resources online that you could refer to for help. Different categories of workouts fall under different departments and there are experts who could best guide you along the process and when it comes to hip flexors then you will find fitness expert who specialise in yoga and stretching techniques to be the best people to refer to for guidance.
You will have to specify your target so that you can find relevant tutorials online but the best way would perhaps be to actually watch someone do certain stretches recommended for hip flexors. The best platform would definitely be YouTube as there are several fitness experts who specialize in unlocking hip flexors who could demonstrate appropriate workouts and exercises that you could easily follow to help stretch your hip flexors.
There are videos from experienced individuals but look for those that are popular as well as reliable so that you can only follow techniques that are helpful in allowing you to reach your goals in unlocking your hip flexors. Once you have found a reliable channel that specializes in this field, you will quickly be able to learn how to unlock your hip flexors.