Hi Mike,

The best thing to do, assuming you have the appropriate account privileges, to improve the resolution of the thumbnail images is to adjust their size by editing the ingest profiles that are used for your uploaded videos.

https://studio.support.brightcove.com/media/general/increasing-quality-poster-and-thumbnail-images.html#ingest

Once the thumbnail sizes have been addressed on the ingest profiles the Jupiter team uses, it’s a matter of re-uploading the thumbnails in the Media Module or re-transcoding the videos in question.

Hello ​@Mike Al-Alawi, 

Thank you for you for sharing your questions on Bright Spot!

​@Justin van Emmerik I want to thank to follow-up this question and sharing the solution.

I would like to complement Mike's answer, our media module allows you to update the thumbnail image for your video easily. You can either upload a new image file or use the "capture" button to create a new thumbnail.

For reference, please take a look at the provided screenshots, which demonstrate the process for each option.

Additionally, you can review the following public documentation for further details:
Brightcove Documentation: Uploading Poster and Thumbnail Images (https://studio.support.brightcove.com/media/properties/uploading-poster-and-thumbnail-images.html#:~:text=Steps-,to,-upload%20new%20images)

Please feel free to reach out if you need any further assistance!