That is possible... but why wouldn't these operators use actual military micro UAVs instead of DJI commercial consumer drones?
Plausible deniability.
A Chinese military micro UAV crashes or gets shot down, and its proof positive of Chinese military involvement. A downed commercial drone widely sold all around the world proves nothing.
I personally imagine these may merely be Chinese individuals (nationals or overseas Chinese) who are there in the middle east out of their own sense of obligation, and who happen to have some own expertise and experience in operating drones and the Kurds have decided to leverage some of that experience for short to medium range recon and artillery spotting.
I would imagine that for these specific individuals featured in the video, they would likely be civilians there by their own choice. They would never have allowed themselves to be filmed and interviewed if they were Chinese special forces there on a covert mission.
However, these guys may be being promoted as cover for real Chinese covert operations personnel to operate in the region, so if and when pictures and videos of Chinese personnel operating in Syria do surface, the Chinese government could point to that video and suggest they are just Chinese nationals there of their own free choice.
That said, I'd be pleasantly surprised (and a little confused) if it turns out those Chinese operators are in the region on behalf of the Chinese govt in any semi-official capacity.
I think it is a safe bet that the Chinese government would have covert operatives on the ground in Syria from early in the conflict.
They have their own serious concerns about radicalised nationals going there to get training and organised so they could return to launch attacks at home. Even if they did not have such serious direct security concerns, they would want reliable intelligence on what is happening over there.
American Intelligence prefers to observe from a safe distance by send drones, satellites, hack telephones and emails, and developing locals as assets. Chinese intelligence does all of the above, but also have a proud and celebrated history of being very effective at getting agents and operatives right into the thick of the action to provide first-hand observations and intelligence unobtainable otherwise. Its a more risky approach, but it does produce results.
I have little doubt that Chinese agents in the field were keeping close tabs on Uighur extremists and had detailed and extensive target lists ready and waiting when the Russians started their bombing campaign.
The real question, I think, would be whether China has made its assets in the field in Syria available to the Russian and French to help them with targeting information, after action damage assessments etc.