DIY LED Part 1: Attaching stars to heat sink

What are you using? Is this thermally conductive Epoxy? What brand, where can i buy this?

It's not actually me in this video, it's a member of our club. He is using a standard 2-part thermal adhesive I believe, you can get this type of stuff in many places, rapidLED, Radio Shack, etc. Look for Arctic Silver. however I have heard - from steve's LEDs - that the 2 part thermal adhesive epoxy is electrically conductive and you really don't want that, if you have a jumper wire touching the PCB you can end up getting a shock from your fixture.

...Continued...there are also thermal adhesive pads from Berquist available via RapidLED's website, or other non-electrically conductive epoxies probably on steve's site.

This video was taken at a local club meeting. It is not my fixture. it's 2" angle iron material IIRC.

how thick is the aluminum bar thank you

I think he was using 1/4" in this video. He has since switch most of his fixtures over to the Maker's LED heat sinks

Is this intended to help anyone? The number of questions here is a fair indication that you are not fit to present this type of info. I have learned nothing like most watching.

This video was taken during a local club demonstration event. So the questions being asked are by people at the event & I uploaded for posting on our local website for anyone who missed it. At the time I did not know much about LEDs, have since learned much better methods. I'm sure you can find many other more helpful videos as well as much worse videos. if your goal was to find bad videos and critique them, then you have succeeded. Congratulations.