I agree it would be great if people could respond to this call in whatever way they feel best represents themselves, sign language, vocal or imagery. My first thought after the video was that it meant praying for death, asking to be released, so I get why some people feel it can give the wrong impression.
Which brings me back to that it should be equally effective if everyone who wishes to make a video do it in their own way, while maybe still keeping it short and simple. Maybe just saying "Please help me get better" out loud, if signs are not for you, or a poster to hold.
My biggest reason for not being comfortable with doing the signs for myself is more that I have never been so sick I can't speak, so I feel like I'm exaggerating if I make signs instead of using my voice when I still have the use of it. That would feel a bit weird to me, as I can't even imagine being that sick and don't want to imply that I do just for effect.
That doesn't mean I don't think other people shouldn't do it. If you feel like it's a good way to represent your feelings and thoughts on funding issues, then go with it. Making a video with signs could also represent our worry and wishes for the sickest among us, who can't make any videos themselves.
The important thing is finding lots of ways to express ourselves so as many people as possible feel like they can take part and be heard, and be open to that someone else might wish to do that in a different way than you.