mobile version and Safari

I’m using the this plugin. (ver. 4.0.3)
I had checked the “Maintenance Mode”,
was inserted into the video code in Page Settings.

After I had the test.
Try to make sure I had a test video looks normal.
And I found a few errors.

01. PC version.
– Chrome: normality
– Explorer: normality
– Safari: Video is “Not appear”

02. Mobile version.
– iPhone: “Not appear”
– gallexy & vega & etc: normality

How can I fix this?

https://ww.wp.xz.cn/plugins/coming-soon/