I did not check the video but using super glue to attach java to rocks is my preferred way.
fishing line and chopped moss?I use very thin and clear fishing line with excellent result, and you don't see the string.
You can tie the string in tight knit, no need to stretch out the moss and the moss will shoot new growth outside of the string. I've tried glue before but I couldn't get the loose moss to attach and got floaters instead. You can also use veil and the new growth will cover the veil in time.fishing line and chopped moss?
if i use fishing line, i would think just stretching the moss in its natural form would be the same. didnt know if there was any benefit to the chopping method.