Video player question

[L i am]

Hi, I have little knowledge in comuter systems. I am learning rendering and animation, the animation part is new to me. I created a small video and I think I needed to save it into the documents folder to play it (I think) so I could play the animation. My 'C' Drine grew in size. The media player is on 'C' drive. that drive is almost full.
My question is: cam I download a media player to 'D' drive and then would I just download my animation to 'D' drive and it will play?

Thanks in advance