It's total garbage. He made that video to make stupid people spin their wheels.
There is 'no such thing' as 'speed pulse signal'. Bandwidth as carried through the twisted pair wire, is limited physically by inductive and capacitive reactance of a twisted pair, and attenuated by I2R losses in the span, distorted by differential mode interferance (which twisted-pair is supposed to eliminate by being... twisted), and finally, what the switchgear is able to handle amidst all the collisions that occur from reflections and losses above.
The ISP does something called 'throttling'... which is essentially... limiting your upload and download data by simply telling IT's end to allow no more than-so-many data packets to pass to or from YOUR ip through their routers. (It's a re-utilized function of the router's designed ablilty to 'choose' a 'least expensive path'...). Typically, an ISP will substantially throttle UPLOAD speeds, in order for them to deliver more 'download speed' content to a large number of customers. Most people who use internet service, use the download path (data to consumer) much more than the upload path (consumer to net). Data packets going down come easier, because the recipient device doesn't need to transmit much... but when your machine does, it requires the switching device(s) along the path to 'tie up' the communication link, delaying data downloads coming the other way.
The stunt he's doing makes no improvement on any aspect, and if it has any impact, it only makes it worse.
His 'speedtest' demonstration was done by setting up a speedtest 'host' on a computer connected on his own internal network... with a little added 'kludging' to make it look real. When I speedtest my file server in my basement (40 feet away), I get ping returns of less than 1mS, and my down and transfer speeds of almost 1gb in both directions... (local networks don't throttle uploads vs. download speeds).