Storyline Resolution vs. Compression

I do an extensive amount of desktop capture video training, rendering in .mp4 format via Camtasia.

When I insert the video into Storyline, compression makes the video unusable.

Is there another format better suited for this purpose, or a setting I can change to allow larger file/higher resolution video?

It seems to be doing the same with screenshots as well.

I have a workaround where I publish just the test, and place a link to the video in in MS Teams the Resources tab.

This makes ensuring the trainee has viewed the video very cumbersome.

Thank you and respectfully, Jack