I talked to specialists and they told me that you can not solve the problem al100% because some pages remain in http and this will be seen.Recently there has been a video plug-in for OxWall called SPvideo lite.
This plugin gives you the option to force all videos https.
I have used it for a few months now and am really enjoying it's development.
As for other issues cloudflare offers support to convert http to https (it is free for now) in other departments such as fonts, images, links etc.
The reason I would suggest this as a temporary fix is that google will be rolling out red flags on mixed content sites soon. Cloud flare will be a temporary fix till sites start changing over to SSL.