How to crop and trim video files as easily as possible?

Post date: 2021-04-13 10:37:33

I need help cropping and trimming a few video files and not sure where to start.

I have a few files in .mkv format that I need to edit. The files are 1gb - 3gb in size and are several hours long. The videos are a screencapture of a live presentation. The presentation plays in a smaller window over my desktop and I'd like to simply crop the video so my desktop isn't visible in the background. Also, the screen recording continues for several minutes after the presentation has ended. So, I'd like to trim the excess video. As someone completely new to video editing, can someone recommend the simplest way for me to do this? I've tried googling and I'm confused by the options and I've tried hiring someone and two people have agreed to do it and then backed out at the last minute.

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