iframe title is not unique
Frames MUST have a unique title (in the context of the page).
When iframes do not have titles, screen reader users are not able to determine the content of the iframe - and whether or not they want to interact with it - without first entering and exploring it. Every iframe requires a descriptive and unique title attribute value. This allows screen reader users to understand what type of content to expect within an iframe such as a video, navigation links, advertisement, etc.
Fix this issue by ensuring each iframe in a page has a unique title attribute value.
<iframe title="Video: Specify the Language" src="https://www.youtube.com/embed/qyjDrUV_el8" ></iframe>
<iframe title="Video: Touch screen for the blind in New York City taxis" src="//www.youtube.com/embed/hM0x0k2Bv3Y" allowfullscreen></iframe>