This illustrates the problem of pushing a suggested work-around that doesn't apply to all the use cases. It might be well and good to download ahead of time for the Come, Follow Me curriculum which was designed for it... but....
People are now scouring the net for inspirational videos, many on youtube and other sites are just not downloadable - teachers, leaders are frustrated - and we are not meeting their needs.
The problem is that FMG and Church IT are looking at this (or at least the instructions coming out to us) only as a scenario for the Come, Follow Me curriculum - The problem is much larger!
I am getting it from all over. I downloaded every bit of video from the medialibrary.lds.org site, all the CES stuff, and many of my experiences are related to helping someone show a video that is just not downloadable. viewing it and bringing it in pre-viewed is tenuous... at best. With thousands of videos prepared ahead of time and available in the clerk office to stream, people are choosing to look elsewhere for videos.
We either need to clamp down on this pick your own random web site inspirational video thing or make our Internet infrastructure more robust. We are expending too much energy, resources, and frustrated people to make the limited savings on Internet Connectivity worth it in my estimation.
Maybe after next week we can take BSA Scout Registration money and designate it for Meetinghouse Internet costs.

“A long habit of not thinking a thing wrong, gives it a superficial appearance of being right, and raises at first a formidable outcry in defense of custom.”
― Thomas Paine, Common Sense