message: Try arrows on mobile
diff: max-height 75vh
  width auto
  max-width 100%
  - +below(800px)
  + +below(950px)
  max-width 100%
  .block-media
  iframe
  max-width 100%
  - +below(800px)
  - max-width 100vw
  + +below(950px)
  + padding 0 unit
  + max-width 100%
  .block-meta
  margin-top unit * 3
  .modalize .block-arrow
  display flex
  + +below(950px)
  + opacity 0.2
  +
  svg.iconic.iconic-md:not(.iconic-size-sm):not(.iconic-size-lg)
  width 20px
  height 20px
  