Bandicam help?

Hey guys, if anyone has used Bandicam before, then they can probably help me with this issue:

So, when I made my Minecraft videos, when I was playing the game while recording, it was as smooth as butter. But when I played the videos back, they went at like 30FPS. I tried altering every setting to prevent it, but to no avail, the problem persists. Does anyone know how to fix this?

@diamondarmor0426

P.S To anyone who uses Bandicam, has anyone had this kind of problem before?

 

Sorry, I don't use Bandicam. I use "Mirillis Action!".

 

@AmazingGhirahim uses Action! if that's what you're refering to. Maybe I should switch to that.

 

Yea, it's pretty expensive but it works great. It's around $28 US dollars-ish. Note: To upload, you go to youtube.com/upload and find the file for the video in Action!. Because the one directly from Action is not compatible with YouTube.

 

Okay, I'll ask my mom and dad about it.

 

I got Action, however, when I play the Minecraft videos back, the only thing it records is my mic, and not the game (it's just black) Do you know how to fix this? I don't know whether to run MC in Windowed mode or Fullscreen.