How to Use Disney+ on a Viewsonic Touch TV Using the Web Browser
If Disney+ is not allowing you to stream videos from your laptop to your TV due to DRM, you can use the Chromium Web Browser App on the TV to go the Disney+.com and stream it from the browser.
First launch the Chromium App (you may have to expand the app windows by clicking the small triangle)

Open a new tab and go to Disney+.com
Once on Disney+.com click on the 3 dots in the top right hand corner

Then check the box next to Desktop Site

Now go ahead and login on the top right hand corner, once logged in you can now stream from Disney+ using the Chromium web browser.