I can cast a video from online not a saved one in download. I have no issue with other apps.
I download files for presentations, I am on the same network, I cast the file from my downloads and it won’t play in the app. I save the file to iCloud and it shows up in my pictures it plays. It is any video saved. Only having issues with this browser. I uninstalled, reinstalled the browser, I reset the tv to factory, I reset the phone to factory, I reset the lab top. I tried 3 tv’s and 2 projectors with cast. I even connected to the adhoc connections the tvs create and try to play a file they don’t get the data. Was on with tv support and they said something is blocking the file from being saved from the app.