Dear Adobe user!
I'm here to ask you a suggestion to update a low quality video on the head page.
Something like: Service Cloud: Atendimento ao Cliente | Salesforce Brasil
Here is the element video: http://www.sfdcstatic.com/assets/loops/service/service_15sec.webm
Feel free to analyze and suggest me a widget!
I am not sure if there is any widget that can convert a low quality video to a high quality video, if that is what you are asking for.
If you have the source video file, you can do that using a movie editor like Premiere Pro.