What about abusing the closed captions feature. I believe it supports links.

--
bawolff

On Tuesday, July 12, 2016, Brion Vibber <bvibber@wikimedia.org> wrote:
> Not at this time, no. It's on my list of things to be able to eventually add.
> -- brion
> On Mon, Jul 11, 2016 at 8:38 PM, Pine W <wiki.pine@gmail.com> wrote:
>>
>> Hi Multimedia team,
>>
>> Is it possible to include a link in or flyover on a Commons webm or ogv video that a user can click to access an external resource such as another video or URL, like Youtube allows?
>>
>> Pine
>>
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>
>