YouTube Android app
- Open the YouTube app .
- Tap Library. Your videos.
- Next to the video you'd like to edit, tap More Edit. Edit thumbnail .
- Select an auto-generated thumbnail or tap Custom thumbnail to create a custom video thumbnail from an image on your device.
- Confirm your thumbnail selection and tap SELECT.
- Tap SAVE.
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Apr 12, 2023 · To change an existing thumbnail, go to studio.youtube.com and click the Content tab on the left. Find your video and hover your mouse over it.
Jul 1, 2020 · Go to the video manager on YouTube. · Find the video you want to change the thumbnail for and click on "Edit." · Scroll down to the "Custom ...