For your needs the scatter brush suggestion may work. Be aware though that scatter brushes place each instance independently, You won't get the "skewing" and "distortion" on curves the same way a pattern brush distorts. So, it really depends upon the desired artwork.
Adjust the defining rectangle for the pattern.
Drag the Pattern Brush artwork to the ...
To resolve this all you need to do is delete the clipping group which is visible on you Layers Panel.
That's the problem, once Clipping group for that specific layer is deleted, hey presto no nasty lines.
Rotate each circle 45° (causing them to have an overlapping anchor point)
Use the Direct Selection Tool (White arrow) to click anchors and delete them, leaving appropriate segments.
Select the middle 2 anchor points and join them (Object > Path > Join)
Rather than rotating the circles, you could also use Object > Path > Add Anchors to create ...
What you're trying to do works better for closed, not open, paths. Try this:
Click and drag to select both points at the top where the shapes meet
Go to 'Object → Paths → Join'
Repeat for the lower ends of the shapes (the points at the bottom of the shapes)
<g id="Page-1" stroke="none" stroke-width="0" fill="000000" fill-rule="evenodd">
Just remove the stroke and set the fill to a color...
<?xml version="1.0" encoding="UTF-8"?>
<svg width="20px" height="20px" viewBox="0 0 20 20" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
I may be mistaken here as I am watching the vid on my phone, but it looks like the paths on the top half is closed, so you wont be able to join them with out opening the path again.
You could use pathfinder to join then but that may close up the gap you left, which mean you would have to cut that out or clip mask it.
I would just open the path on the top, ...
It is necessary to select the nodes of the individual lobes and use the join selected node button in order to get a complete fill. Use F2 to enter node editing, click on one path, shift click on second path adjoining, then draw a bounding box over the common nodes. Using the join selected node button will create a single node where there was previously two. ...