Adding videos to posts and pages

Hi All,

I am currently using the Ashe Pro theme to build a website and I am trying to add some short videos.
I have tried posting them to my Youtube channel and then using the “Youtube feed” plug in but it keep saying error occurred. I have tried uploading them but again error occurred.
Also the Metaslider I am using for slide shows keeps encountering problems.
Is there any easy way to do this or any good plugins that will actually work?

Any advice would be greatly appreciated.

Many thanks
Louise