Can't download video from sandboxed iframe in IE11

Question

There is the issue in my application related to using iframe to embed a video. The video has a download button to download the video. It works fine at all browsers except IE11.

I click to download button in video inside iframe. As a result the new tab opens and nothing happens.

We use SANDBOX attribute for this iframe and can't delete it according to our security policies.

sandbox='allow-same-origin allow-scripts allow-popups allow-downloads'

Could somebody help to understand why it doesn't work on IE11 only? Are there any ways to fix the issue?

Video in iframe

Result of trying to download

Answer 1

I assume because IE11 does not support the allow-downloads sandbox option, see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe#Browser_compatibility