Yes you do need something. El cheapo method is to drill a hole in the centre of the bottom of a 35mm film canister. It fits nicely into a 1.25" drawtube. The better way is to buy a cheshire (or collimating) eyepiece and do the whole thing visually. ($69 from here
https://www.bintelshop.com.au/welcome.htm ). This works better than the basic laser routine shown in the movie, which can be grossly wrong, even if everything is done by the book. (see
http://www.smartavtweaks.com/RVBL.html or
http://www.obsessiontelescopes.com/l...ml#Collimation).
The technique I use is to use the cheshire eyepiece to centre the secondary and then the laser to adjust the tilt of the secondary (both of these as shown in the movie), but then use the so called barlowed laser technique to adjust the primary (see the link above or google "barlowed laser"). It's pretty similar to the basic technique in terms of time and difficulty. You only need a small, easily made piece of extra equipment plus a barlow lens.