YouTube embed video accessibility issue

[I-Valchev]

It looks like there's a known issue with YouTube embeds missing the title attribute.

Check more here: https://adrianroselli.com/2017/08/inaccessible-youtube-embeds.html

Since we already fetch a title to show in the backend and elsewhere, it would make sense to include it in the Embed by default so it doesn't get flagged by accessibility tools such as Lighthouse