I will show a easy step by step process, for Changing a Thumbnail on YouTube with pictures. A good thumbnail is very important for a YouTube channel or for that particular video.

Changing the thumbnail is pretty easy but still many of us find it hard as a beginner. So, here I’m going to tell you and the viewers of this answer how to do this.

4 Simple steps to change youtube tnumbnail with pictures help:

1) Go to https://www.youtube.com on your browser and click at top-right corner (on the Google’s profile picture). A list will appear.
Click on ‘Your channel’.

2) Your channel’s page will open. Click on blue ‘MANAGE VIDEOS’ button.

3) Go to ‘Videos’ from the options present in left pane. A Channel videos window will open. It’ll show you the list of your uploaded videos.
Click on the small ‘pencil’ icon beside the video whose thumbnail you want to change.

4) The selected video’s details will open. Scroll below and find ‘Thumbnail’ section. Click on ‘Upload thumbnail’.

5) After setting up the new thumbnail click on the blue ‘SAVE’ button present on the top-right corner.

This is how it is done. I hope you find it easy and this guide works for you.