The video is representing what a crab sees. An abrupt cut is either implying that the crab stops seeing (for brain damage reasons), or the video is not quite living up to the promise, and they are asking which it is.
Some ui/ux issues aside, this is an incredibly useful feature for both work and personal use.
An example of it being useful for work: I can have several AWS consoles for different environments open, so I can quickly compare configs between environments.
For personal use, I can contain facebook inside its own container so it’s cookies don’t pollute my regular browsing
