[CentOS] Browser doesnt work

Sun Oct 13 15:43:03 UTC 2019
Georgios <gpdsbe+centos at mailbox.org>

Hello.

Im new on Centos
I recently installed Centos 8 and i have the following problem with my
browser

I cant play media on the browser.

for example i cant play.
https://twitter.com/Ffs_OMG/status/1183397555914366976

Or i cant listen shows or songs on mixcloud.

for example 
https://www.mixcloud.com/parapolitika-parapolitika/%CE%B3%CE%B9%CF%89%CF%81%CE%B3%CE%BF%CF%83-%CF%80%CE%B1%CF%84%CE%BF%CF%85%CE%BB%CE%B7%CF%83_%CF%80%CE%B1%CF%81%CE%B1%CF%80%CE%BF%CE%BB%CE%B9%CF%84%CE%B9%CE%BA%CE%B1901_24-5/

i get the message 

"Sorry - your browser is not supported.

Please update your browser or install another such as Google Chrome.
Mixcloud requires HTML5 audio with MP3 and MP4 support."

I suspect that these 2 problems relate.

Any ideas how to solve this problem?

Thanks in advance!