Have you experienced system slowness or an app crash when using Hangouts video chat on your Chromebook? A bug report shows a possible issue that’s being researched for a Chrome OS 74 fix.
Sound support is still in the works for Linux apps on Chromebooks, but the first function will simply be that: Sound playback. Audio recording is slated to follow and camera access — needed for Skype video — isn’t even on the roadmap yet.