If you don't feel comfortable posting a video, watching yourself throw still helps. You'll be surprised at things you are doing wrong that you thought you were doing right.
I was in the same boat for my first two years. Seeing myself throw was what helped the most. Focus on changing one thing at a time. If you notice an improvement, keep repeating that motion until it becomes ingrained in your muscle memory. Then focus on something else and repeat.
It can be confusing listening to advice in a forum because there are different techniques that allow you to throw far. Which technique works best varies from person to person. However, there are certain fundamentals that are required for every throwing style. I remember seeing a thread in DGR on those fundamentals. I will see if I can find it and post a link here.