Height cut-off

[tracend]

On portrait mode the video stretches to the edges of the width (as it is set to 100%); if the aspect ratio is bigger than than that of the screen then there appears to be letterboxing.

This can be solved if the video has width: auto As a side-effect of that the video might become bigger than 100%, so the container needs these styles to avoig horizontal scrolling:

width: 100%;
overflow-x: hidden;

Consider adding them these dynamically, possibly behind an option flag.