I've seen too many illusions (a trick is something a who-re does for money, Michael!) to take anything like that at sight and not under controlled lab conditions.
If you (the reader, not just Tawnos) are religous, its too easy for the old man in the video to be plausible.
All the major religions differ on doctrine and so forth. But, one thing they all have in common is that man is a soul or spirit inhabiting a body.
This suggests a question directly on point with the old man's abilities: how does the soul/spirit control the body?
Think about it for just a second. If the soul/spirit is not the body, then it necessarily controls the body somehow. How? Somehow it must impinge on and cause the body to move--its arms, legs, etc. How? How exactly does that work? The body is a physical universe object. A complex object to be sure, but an object nonetheless. So, how does this thing called the soul/spirit affect the body to the point the arms and legs and so forth
actually move?
Send a signal on the nerves? OK. But, the nervous system is a physical universe system. How does the soul/spirit transmit a signal from within himself to the nerves?
Three options. Thought alone. Creates and directs energy at the nervous system. Traction--a pulling instead of a pushing, like magnetism.
Of the options, thought alone certainly makes the old man's alleged abilities plausible. If he can control his own body (makes its arms and legs move) by thought alone, I see no reason he couldn't cause another body to move. Its just a matter of distance. He, as a soul or spirit, would be in closer proximity to his own body than his patient, but he's within touching distance of his patience. So, the difference in distance between his own body and his patient is pretty small.
Creates and directs energy. Certainly makes the old man's alleged abilities plausible. If he can affect his own nerves by creating electricity from within himself as a soul/spirit, I see no reason why he might not also be able to create other forms of energy--for example heat. This, by the way, completely upsets the laws of conservation of energy.
Traction. If he, as a soul or spirit, can create an effect similar to magnetism in order to cause his own arms and legs to move, it seems entirely plausible that he can either also create other effects, or has the potential ability to create other effects, such as creating energy from scratch.
He may be unusual compared to the average person; but, if a person is religious and believes in the soul/spirit, the old man's abilities are definitely plausible. No reason at all for a religious person to reject them out of hand.