Thank you John.
The Version of ACF is 5.3.2.2, WP 4.3.1
I will try that and see what happened.
Thank you again for your help.
Noted. Thank you very much John for your kind help.
Hi John
Thank you very much. I know that it is not the right way to do so but, here is the plugin page:
https://wordpress.org/plugins/videojs-html5-video-player-for-wordpress/
Thank you very much again for your support.
Hi John
I am using ACF 5.3.2.2.
And yes, I can have ACF work if videoJS is deactivated.
However, since videoJS can help me to create a responsive video, and I found that if ACF can fix the problem of this generated JSON string, I don’t need to deactivate this plugin. 😀
Hope you can understand and thank you for your help.
Remove old page and create a new page, then assign your custom fields group to that new page works for me.