I just found a list with some of my 2-3 years old YT accounts and I found this one video which has over 3M natural views. The thing is the text in description is completely unrelated to the video because at that time I was downloading in bulk, adding some text to description and re-uploading back to my own accounts and somehow this video got lost in the flow because lets say I was targeting "weight loss" so I was downloading videos and adding text related to "weight loss" but this video's subject is about the "weight of a cucumber". So right now the video isn't ranking very well for any relevant keywords, is just floating around getting 5-6K views/day simply because it is an interesting video and people like and share it. The question is, If I optimize the title/description/tags for a good keyword related to the actual subject how will google see this change ? Can be a good idea maybe to unlist it for a few days, optimize it and list it again ?