Youtube links not converting to videos

Hi there! We noticed when users want to embed a video it doesn’t automatically convert to video (basic WP functionality), it shows up as a link…

I ran a few tests to confirm this, simply pasting the link will output as such, a link (for instance: https://dev.mezines.com/2020/05/10/omarfpg-test/)

However, using text editor instead of visual editor, or pasting link without format, will output the embedded video (for instance: https://dev.mezines.com/2020/05/10/test-2/
and https://dev.mezines.com/2020/05/10/test-3/ respectively).

Got any more direct or permanent solution for this? ??

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