: You need an Amazon Developer Account and an AWS account to host your skill code.

: 1920x1080 (Full HD) is the standard for most smart displays and web players. Bitrate : Aim for 8-12 Mbps for high-quality 1080p video.

If you are simply trying to a file named Alxka.mp4 :

: Most ALEXA cameras record natively to Apple ProRes (422 or 4444) in a QuickTime (.mov) wrapper, which is easily converted to MP4.

: Use the Alexa Skills Kit to develop skills that play video files like MP4s on Echo Show devices.

: Upload MP4 clips to Amazon Photos to use your Echo Show as a digital frame that plays short video memories.

: For maximum quality, cameras record uncompressed ARRIRAW which requires specialized software like the ARRI Reference Tool to process. Production Guide