This goes into many details about the process of synchronising the video between devices, as well as a variety of different methods which the process can be implemented (it doesn’t just cover what Chromecast does).
I haven’t checked the other 2 patents quoted, maybe in the full article they show some differences (the figures are all the same, though).
That entire patent is technobabble that means “send content to a display”. There is nothing about it that’s in any way innovative or that it’s even possible that they were one of the first 1000 people on the planet to think of.
The figures show and the full patent describes a number of processes that define exactly how it’s done. It’s not technobabble, but a process. Overall it does “send content to a display”, but it’s the way it’s done that makes it patentable.
If you were to develop a process that was different and didn’t use the methods claimed in the patent, it wouldn’t be patent infringement. However, apparently Google’s method does use this process - they didn’t even try to argue against this, instead they claimed the patent was invalid. I haven’t seen Google’s specific arguments on this matter so I can’t really comment on it, other than to say the jury didn’t agree with Google.
The entire premise of allowing people to “invent” extremely obvious, extremely simply things is an obscenely broken system. Submitting a patent application for this shouldn’t just get rejected. It should get you permanently barred from ever being able to submit or own a patent until the end of time.
So you just have a bee in your bonnet about patents in general. I see.
The patent system is far from perfect, but it isn’t completely broken, as you might claim. For an example of it working properly, you only have to look at your phone - chip designer ARM designed almost all the processors in your phone; they patent the designs and then license them out to manufacturers such as Samsung and Qualcomm. These other companies lack the technical ability to develop processors, while ARM lack the manufacturing capability to mass produce them. Patents allow the two groups to work together to produce the product you rely on every day.
I think you should try and focus on patents that actually aren’t properly thought out, eg Apple’s design patent for a rectangle inside a rectangle with rounded corners.