You can hit ctrl + shift + j to load the error console to see if there are any errors for Twitter. Maybe one of the error messages will reveal something.

In the developer tools, you can switch to the network tab, check "disable cache", and hit ctrl + r to reload the twitter page to test if the network log shows any errors.

Also in the developer tools, you can hit the 3 dots at the top right, goto "more tools", choose "network conditions", turn of the use of the default user agent and then set Opera to identify as Chrome or Firefox. Then, ctrl + r to reload the page again to test if that helps.

You can also test with Opera's VPN on to test if that makes a difference.

Are you trying to install Opera on another drive by any chance? Are you running the installer on that drive or your system drive?

If you're trying to install Opera on another drive, what filesystem is on the target drive? NTFS or FAT32/extFAT?

I'd also try to install with the offline package at https://www.opera.com/download#opera-browser to see if you have better results.

Before trying to install again, I'd open up the Windows Task Manager and make sure there are no Opera installer processes running. Then, I'd delete all files and folders in your "C:\Usres\yourusername\AppData\Local\temp" folder. Might be good to clear "C:\Windows\temp" also.

@kelvynruppel Then either WhatsApp web doesn't support sharing videos or there is a Chromium bug preventing it.

After updating opera I receive this error:
opera: symbol lookup error: opera: undefined symbol: av_stream_get_first_dts
then i just reinstalled opera-ffmpeg-codecs in Software Manager and it worked.
My system is manjaro KDE

@windy0windy I also have such a problem, after updating the opera it does not start, I tried everything, it's tin!

En el menú de Opera hay un apartado que dice Desarrollo, dentro de él otro que se llama Administrador de Tareas, hay podrás ver la memoria y la CPU que consume cada pestaña y cada extensión. También puedes poner la url de esa página en virustotal y que la escanee a ver si está limpia.