There is a known issue when attempting to launch fullscreen when using the Google Chrome browser when using Windows PCs that utilize touchscreen displays. To resolve this issue you can either use another browser such as Edge or Firefox or you can use the workaround below to utilize the player in Chrome.
To enable fullscreen viewing in the Google Chrome browser:
-In the URL bar, go to: chrome://flags/
-Change "Enable touch events" to "Disabled" (see screenshot)
-Click "Relaunch Now"
Once the browser reloads, fullscreen will work.