Page Speed needs improving

Hi,

I have solved many GTMetrics and SpeedInsights suggestions, but still I couldn’t reached a high speed loading (less than 5 sec).

Is this related to my web hosting service? Or is there anything else I can do?

GTMetrix: https://gtmetrix.com/reports/karatefaixapreta.com.br/ue8umq8D

Page (one of many who has 3 videos on each): Karate

Thank you very much!

The page I need help with: [log in to see the link]