Snapping Vertices to One Vertex on a UV Map I am following the tutorial for Creating a Lowpoly Concrete Barrier.
At about 29 minutes and 4 seconds he begins snapping the first two pieces of the texture in the UV map. I believe I have the settings the same and I managed to get the first vertex to vertex to snap. However when he snaps the right side it is multiple vertices to one vertex and the image seems to move instead of growing bigger (hard to tell b/c he is zoomed in).
The image below is the point I get to:


...however every time I try to snap this ends up happening (one vertex gets pulled and snaps versus all vertices moving and the lowest one snapping:


I have spent the last hour trying to find how to do it how he did in the video and I'm at a point where it's just become frustrating, but I don't want to give up. What am I missing? Thanks.
Try using G instead.
By clicking with  RMB, you are deselecting everything but the vertex under the cursor, which will then be translated.

Translating/grabbing with the mouse is sort of intended as a convenience thing to quickly be able to tweak individual vertices without pressing G.

The reason why it can't work for translating a selection of multiple elements is because  RMB is already used primarily for selecting. So clicking will first select the vertex under the cursor, then after moving the cursor 10px with the mouse button held, the grab/translate operator is called. This 10px threshold is configurable in &#9096; Ctrl&#9095; AltU> User preferences > Input > Tweak Threshold:



In most places and most of the time you'll want to use G for translating/grabbing.