Hello. Does the video work on mobile devices, if compiled through the android studio? Do DOM objects work? In which mode is the project compiled (webview, canvas+)?
Yes, video and DOM objects work on mobile. Always use the webview option. Canvas+ is not officially supported, having been deprecated since 2015, and does not support DOM objects. I'm not sure about video either. This is part of the reason it's deprecated: Canvas+ has poor feature coverage. Webviews support everything.
Thanks for the answer. In Construct 2, there were problems compiling in webview through in CocoonIO (white screen). I hope in c3 there will not be such a problem.
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Please report any such issues to Cocoon. We also recommend using PhoneGap Build, C3's own build service, or you can also try the Cordova CLI.