toi can do that on Photoshop in case toi didn't knew.

Please don't post this anywhere else nor claim it as your own.
Enjoy ♥

Made in Photoshop CS5

Step 1
Open Photoshop. Go to File → Open → and choose the video toi want to screencap.

Make sure your video is .mp4 format, because if it's on another format it won't work.


Note: If a message saying "QuickTime 7.1 ou later is required" appears, don't worry. Just download QuickTime and try to open it again.


Step 2

Make sure toi see the animation toolbar (it has a red mark all over it, on the picture). If toi don't see, go to Window → Animation...