* Get participant specific video element
We now have the ability to select the video element for specific participants. I'm tweaking the jitsi-meet-electron app for my use case. I need to open Always On Top windows for specific participants, so the current _getLargeVideo() wont suffice.
I made a post about this in the Developers section on the Jitsi Community Forum, but it got blocked by Akismet.
* Add dots at end of sentence.
* Fixed ESlint errors and add additional check for iframe.
* Use _myUserID instead of string.
* Return the local video by default if participantId is undefined.
* Fixed mistake in string template.