If your struggling to post replays then follow my guide below.
Go to watch replay and click on share (circled)
A box will come and click on copy in the bottom right
You can then type a description of your shot like below
Then highlight by clicking on the start of the word and dragging it across to the end. After you've done that click on the little chain on the bar above.
Another box will come up. In the link url you need to right click and paste. In the target box change it to open link in new window. Then finally click on insert and your done. When you post your post the description of your shot should be green and everyone else can click on it and watch your shot.