UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.95 Safari/537.36

Steps to reproduce the problem:
1. define a <video> tag with loop attribute (and point it to a source that has a cache-control and etag header set)
2. notice that the video is never loading from cache (and that each loop requests the video from the server again)

What is the expected behavior?
That the video will be loaded from cache

What went wrong?
All files hosted on s3 automatically have an etag (and this is not somethign developers have access to change/remove).

Looking around, it seems like the etag may be what is causing this issue.

You can see an example of this problem by watching the network tab in chrome dev tools for both snapchat:

https://www.snapchat.com/download

or bumpers.fm websites:

http://bumpers.fm

Did this work before? N/A 

Does this work in other browsers? N/A

Chrome version: 55.0.2883.95  Channel: stable
OS Version: OS X 10.11.6
Flash Version: Shockwave Flash 24.0 r0