- WordPress embeds are not truely respnsive. Bad workarrounds like max-width: 100% on iframes let videos show in weird aspect ratios with black bars.
- WordPress embeds are use oEmbed, and oEmbed **sucks** for videos embeds.
- WordPress embeds use providers defaults, ARVE enhances embeds with usefull options by default.
- WordPress embeds cant be aligned.
- WordPress embeds give you no controll over them whatsoever.