On page https://dekamarkt.meoconcept.nl/video/ there is a video in an iframe element. This iframe element has been given a title attribute with a description, this is well taken into account. However, it should also be made clear what kind of content this iframe contains. This can be done by adding “Video” to the description in the title attribute. This also applies to the iframe with the video on the page.
In Wordpress “Video” isn’t be added by default, but maybe there is a filter to add this?