Video on Slide show not adjusting in cell phone

Technical Q&A
1

Hi guys,

I have added a video to a costumer store instead of a pic on the slide show. On theme.liquid I added the code below. The video is playing good but:

  1. How to make it automatically adjust to cell phone and to desktop?

  2. what is the best size of video to it apear as wildscreen?

The store link is https://diehaargalerie-shop-ch.myshopify.com/

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