I am editing video on Premiere CC 2014. I have second hand video from YouTube that I need to take bits from as per a client's suggestion. Once I've done this I want to remake the fresh edits with the raw footage. Is there any way to match video based on audio. Any program to compare edits with raw footage?
In Premiere, you can align clips based on audio by putting the clips on separate tracks, selecting them both, right-clicking on one, and choosing, "Synchronize."
As far as "programs to compare edits with raw footage," DaVinci Resolve has a pretty robust conform process that lets you play a reference video along with any xml you've got from Premiere (or FCPX, Avid, whatever). It also has a Scene Cut detection feature, which is helpful when there are a lot of "bits" to extract. I don't remember which features are included in the free version of Resolve, but BlackMagic typically only restricts features meant for Hollywood studios. It's worth learning, if you have the chance, just to use whichever tool meets your needs.
But if you don't have time to dive into another full NLE, you could just stack your reference video at the top of your Premiere timeline, turn the opacity down, and lock the track.
If your downloaded videos from youtube aren't cut, you can simply make the clip offline and relink it again.
If the downloaded video is edited though, this gets a bit harder. For good audio Quality, you can use Sync. Simply Google "Premiere Pro Sync Video"
If this isn't possible, you'll probablly need to align it manually. Roughly match the videos and put them above each other, make the top one a bit transparent and fine-align.