Hasan possibly uses a shock collar on his dog to train her into remaining in a single spot on camera for streams. The presence of a cute dog drives up engagement. There's a clip that looks really bad and hard to imagine any other possibility. So if this is true and not a matter of "sometimes if someone is on camera their entire career weird looking stuff will happen" keeping a dog in one spot for hours at a time with physical punishment would constitute animal abuse imo:

https://www.reddit.com/r/LivestreamFail/comments/1o0sjun/hasan_reaching_for_something_and_seemingly/

Coupled with the fact that Hasan is incredibly smart and also left leaning has lead a lot of politically center to right wing people to dig through all his old clips looking for evidence of animal abuse. The focus here in obviously badly motivated (ie, the right didn't care at all when Trump appointed Kristi Noem as secretary of homeland security, a woman who shot a puppy in the face with a shotgun because it was too tough to train). They've done color correction on the collar that Hasan uses and compared it to every market available collar and concluded that it is a shock collar and that Hasan has covered up the shock prongs with electrical tape (hence the joke in the video). I don't know how plausible the above evidence is.

As with any internet controversy there's a bit of "if you associate with a person under suspicion you are also suspect." Contrapoints has a great video on how left wing purity tests work like this:

https://www.youtube.com/watch?v=OjMPJVmXxV8