Gait analysis has been used as evidence in other cases. Standalone might not fly in this case but if it’s used as supporting evidence it can be very convincing.
In one of the video’s the hooded character stops in front of a townhouse and stands up on their toes to look across the street at something. The person is most likely a female based on that posture IMO. I would agree that the gait also appears to be that of a female. That noted, it will take a lot more evidence than gait analysis to ID the person.
There’s also an instance of dragging the bag, which implies a lack of apparent upper body strength. Whoever this is, the person was very familiar with this particular area and is likely an adult based on the very cautious pattern of their activity.
The unusual style of shoes worn that night will likely play a significant role in helping to identify the perp.