Hi
I would always try to save direct link to the replay (by emailing yourself). Then, you will always have it in your email and can share it. This way my top 10 replays can stay top 10 and I usually rhave 1 slot open for really something special.
You can share that link from email with anywhere and it will work. When you share links from your browser when look at replay, sometimes they may not work. I am not sure why either, but I had that happen to me as well, so started to saving replays to email.
happy hitting;)
-wgticon