Do You Ever Change Thumb Nails on Older Vidios?

Of all my thirteen hundred videos, i've changed the title after i upload maybe four times. But am obviously for changing thumb nails on older vidios. If you change a thumb nail in an old vidio, t doesn't matter if it's five years old, if the ctar goes up, like he said earlier, click through eight then you two will promote the vidio more. So make sens yes, ow thit's interesting. I've done it multiple times with other peoplend and people go through and they change all their titles and thumb nails to just be more interesting,. not to be misleading....