Video: Arguable, since a lot of times is part of the basic design and very lightweight. Audio: MUST be muted be default. There's nothing that I hate more than

Video: Arguable, since a lot of times is part of the basic design and very lightweight. Audio: MUST be muted be default. There's nothing that I hate more than opening something in a new tab for later, and a few seconds later, having to track down there that damn noise is coming from. Always, always, mute tabs be default!