He could take it off since it was fully charged. Nothing related to Grid 2.0…On existing grids also, we can remove once the vehicle is fully charged. See the two below quoted announcements from Abhishek
Furthermore I found some more incorrect information in the above video
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He says new grid can be used by other EVs also while old one cannot…This is incorrect. even the older grid charger can charge other EVs. There is a 15A socket in both old and new Grid chargers
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He says this is compatible with all the other models-The older one was too
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He said it charges faster - No, old public chargers also charge at the same speed as of now (1km/min for 450 and 1.5km/min for 450X). In the video you can see that from 48km range it went to 56km in around 6 mins of video time (02:42 to 08:35 of the video) When he finally took his scooter out time was 08:03pm with the scooter fully charged. He said it added 30kms in 30mins. I don’t know how 05:26pm to 08:03pm is 30 mins! Ok, let’s assume that he had removed his scooter for the other girl in that video to charge her scooter after some minutes. But even then 30kms in 30mins of cumulative charging time is not really faster. he said that after 80% it charges slowly which is true. considering all these 30mins of cumulative charging time for 30kms range 44% of charge is the same speed as that of the current public grid charger
The grid 2.0 has no change to the end user at the moment (apart from the looks).For Ather however there are some benefits. Since it is one Single piece compared to the 2-piece design, it will be faster and cheaper to manufacture and easier to install. See below announcement from Abhishek and tweet from Swapnil.

The thing that I’m most excited about this Grid 2.0 is…If it has got really cheaper, in future one might be able to get this installed in their home as their primary charger (at an additional cost obviously). Battery degradation may be a topic but I hope this Grid 2.0 is smart enough to let people choose when to fast charge and when to choose slow charging.