Host OS - Windows 10 64-bit
Guest OS - Ubuntu 18.04.1 LTS
Using latest Virtual box (6.0.2) and already installed latest guest additions
In the virtualbox audio settings:
Host audio driver: Windows Directsound
Audio controller: ICHAC97 (other options are Intel HD audio and Soundblaster)
With ICHAC97, the youtube video is playing fine but audio is crackling and repeating.
If I change to Intel HD audio, the video doesn't play at all and of course no audio.