WordPress iOS Video Viewer

I’m so frsutrated. it’s been about two weeks.
I’ve installed over a dozen Video plugins.
All I want to do is upload an MP4 video.
Add it to a post.
And have it so that I can click on it and view it on my iPhone.

I’ve been an iWeb user for a couple years now.
All I had to do was add my videos to the posts, and they played.
That’s what I’m trying to do here.

Anyone got an idea?
If you’re pointing to a plugin please give me an url so I can see it working WITH that plugin, because I have installed dozens and tested them all with no avail.

I get a video where the sideways triangle has a circle with a line through it and the video never works…