Is this a displacement or just a blockage?
If the pipes are displaced all jetting will do is clean out the debris that have made there way into the pipe, so yes you want confirmation. If the pipes are separated soil will continue to find its way into the drain, possibly causing a large enough void that can create a failure in a slab above and possible backups. I believe the problem was at ~ 1 minute , till about 1:18, I also saw something but it could just be a clump of something that got stuck, jetting and verification to make sure should not be a big deal. 
I would ask for a second video just to be sure , the rest of the pipe is old but looks in good shape.