It was only a small step from the big background images trend to the big background videos one, and it appears that this too has become a thing. And it isn’t bad at all, if it is done properly and the video isn’t large enough to crash the users’ browsers.
The best thing about it is that it makes sliders useless, not that they weren’t already, but now there’s another reason for not using a slider. However, this doesn’t mean big background videos should be used everywhere you normally had a slider. There’s a time and a place for using either of them, and must be carefully picked in order to make the website efficient and presentable.
The video medium is a very good one when you are trying to deliver a direct and clear message to your audience. And if you are presenting a product, by making a visually appealing video, you automatically win the trust of the customers.
Big background videos, especially when they are associated with a call to action button, like Spotify did, are a great way of increasing the conversion rate because the user is captivated by the information presented and is more likely to push the call to action button, than in a situation where he has to read the description of the product.
Making it easier for the visitor is a fundamental task of the web designer in order to get conversions and big background videos can help, if used properly, so consider using such a technique in one of your clients’ websites. To create something that is similar to the examples showcased below, you can use plugins like BigVideo.js or Tubular.