If you mean Netflix etc. Streaming is handled inside
opera and chrome with Widevine. In earlier versions this
was done by using a static version of libwidevinecdm.so inside the opera .deb file. Today this is handled dynamicly.
checking the opera binary :
ubuntu@ubuntu:/usr/lib/x86_64-linux-gnu/opera$ strings opera | grep -i widevine
Media.EME.Widevine.VideoCapability.HasEmptyRobustness
application_x-ppapi-widevine-cdm
Widevine enabled but no library found
../../opera/desktop/chrome_imports/chrome/browser/component_updater/widevine_cdm_component_installer.cc
Widevine CDM v1.0
Failed to update Widevine CDM hint path.
Installed Widevine CDM component is incompatible.
Registering component updated Widevine
Registering bundled Widevine
Updating hint file with Widevine CDM
Widevine Content Decryption Module
com.widevine.alpha
WidevineCdm
widevinecdm
com.widevine.alpha
widevinecdm
com.widevine.alpha
Widevine Content Decryption Module
component_updater.widevine.up_to_date
Widevine Content Decryption Module
opera.mojom.WidevineCdmUpdater
WidevineCdm
latest-component-updated-widevine-cdm
Widevine Content Decryption Module
WidevineVersion
com.widevine.alpha
com.widevine.alpha
com.widevine.alpha
com.widevine.alpha
com.widevine.alpha
WidevineI
ubuntu@ubuntu:/usr/lib/x86_64-linux-gnu/opera$
looking for "opera 86 widevine_cdm_component_installer" i came across a webpage https://malaysiandigest.com/how-to-enable-widevine-content-decryption-module-in-opera/ which hinted to check : opera://components
opening that url opens a page, which next immediately started updating all kind of things :
opening and updating above components will fix your streaming problems.