When I view my website on mobile devices, there is no background image displayed before playing a video. Below is the HTML code I am using:
<div class="row " >
<div class="col-12 text-center">
<video controls>
<source src="image3/video.mov" type="video/mp4">
<source src="image3/video.mov" type="video/ogg">
</video>
</div>
</div>
The video plays fine on my laptop, but on my phone, there is no background image shown before I press play.
Make sure to include the poster attribute when adding a video element.
According to MDN:
poster
This is a URL for an image that will be displayed while the video is loading. If you don't specify this attribute, nothing will show up until the first frame loads, at which point it will be displayed as the poster frame.
<video controls poster="https://www.ddfl.org/wp-content/uploads/2018/03/bunnies-easter.png">
<source src="https://www.learningcontainer.com/bfd_download/sample-mp4-file/"
type="video/mp4">
</video>Would you consider trying to use a separate image as the thumbnail instead? Here's an example:
<div class="row">
<div class="col-12 text-center">
<video poster="thumbnail.png" controls>
<source src="image4/video.mov" type="video/mp4">
</video>
</div>
</div>
poster="" allows you to specify an image as the beginning frame (thumbnail), for more details check here.
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