There seems to be something off here(?) as Darth mentions in his comment here, it seems like the data is already in the disk and they simply perform a normal channel close from the data backup. You can see that it's a normal channel close by seeing the total balance in the end and comparing it with the balance in the beginning of the video..just some 390 sats of difference, which looks like the fees for two 1sat/vB transactions.
So misleading by using the phrase "nuking our lightning node". You aren't nuking jack shit here buddy. Just doing an "uninstall app" doesn't convince me or any rational person. I want a video of you taking a drill and going to town on the pi and ssd/hdd and then recovering your funds. Also, the proper way of recovering from the channel failures is using SCBs on lnd and not using the channel.db backup. You aren't even supposed to keep backups of channel.db.