Alright, Bandicam is reputable in recording gameplay so it's a good option to try. For me, I also take Joyoshare screen recorder for Windows as another choice when record screen and games. It can capture 60 fps in high quality no time limit and no watermark. Anyway, the output quality for viewing is important.
How to increase FPS on your PC or laptop to improve gaming performance, you ask?
Here are the techniques:
1. Update your graphics drivers.
2. Give your GPU a slight overclock.
3. Boost your PC with an optimization tool.
4. Upgrade your graphics card to a newer model.
5. Switch out that old HDD and get yourself an SSD.
6. Turn off Superfetch and Prefetch.