I meant if you were playing downloaded video files; but if only have DVD & streaming services as sources, indeed that limits the options.

How do you capture the screen? Print Screen key then get the picture in an image editing software?
If so, have you tried with other software that have capture options on other user-defined hotkeys? For example XnView has such option to capture images.

Amazon and Netflix are DRM protected. I would guess that is the issue there.

My cable company's DVR is cloud-based so I am able to watch things from there on my devices.

If you're on your PC, just pause and use the Windows Snipping Tool. I did that for the 1968 film "I Love You, Alice B. Toklas!" when I rented it on Amazon.

I tried it. It's absolutely worthless.

Is it possible to replace pictures with better ones ?

Only admins can change the main pic.

If you have a better replacement pic, you can use the "Store Pictures on the Site" link right above the comment box. Make sure you have the "automatic resize" button clicked, then choose your file or if you already have it uploaded to another site, copy from remote address. Copy the link that pops up and put it in a comment. Make sure you put "Replacement Pic" with the photo so the admins know. We will change the pic for you.