Could you confirm which player is in use and what is the CMS/player version please?
If it is Xibo for Windows, then it should render it the same as the IE11 does.
Regarding autoplay, if it is Windows, then you should be able to just add ?autoplay=1 to the end of the youtube URL, you should also use the /embed url, ie for example for the first URL you provided it should be:
https://www.youtube.com/embed/HVywAcElAOI?autoplay=1
Alternatively you can use the script to achieve it (which will work on Windows as well), for more details please see: Autoplay Embedded Youtube Videos