To support multiple devices with various resolutions like laptops, tablets, and smartphones, we need to change the resolution and format of the video. 

This can be done easily by an AWS Service tool called the Elastic Transcoder, which is a media transcoding in the cloud that exactly lets us do the needful. 

It is easy to use, cost-effective, and highly scalable for businesses and developers.

https://aws.amazon.com/elastictranscoder/#:~:text=Amazon%20Elastic%20Transcoder%20is%20media,like%20smartphones%2C%20tablets%20and%20PCs.

A service that converts any given video format into other formats specified by the user.