If you take off the tire, and try to turn the output shaft by hand you cannot do it. The gear set is built to turn from the opposite end.
I don't know what if any issues this presents but I'm just sayin' all the load is delivered exactly opposite of the way the set was designed.
For a mile or so if I broke down... Maybe.
Several dozen miles to the dealer... No. Just my opinion.
The other thing to consider is the fella shows a motorcycle with a free wheelin sprocket. His gear box is not involved in the process.