I looked at this clip and while I've never used that platform or have any idea what your account balance looks like, it appears this is what you did.
Shorted 0.06 BTC @ $9705.89
Covered your short @ 9704.95 (a profit of $0.06 on your trade)
Paid $0.11 in fees
End result is that you lost $0.05. My guess is that you were shorting slightly more BTC than you had in your account which triggered additional margin fees. Not sure where you think you made 5%, but my guess is it's a misunderstanding of what "mark price" actually means.
Thank you for your comment.
The PNL is "Unrealized profit and loss on this position calculated based on Mark Price, and return on equity percentage.". It becomes realized profit when you obviously sell it.
The mark price and PNL (ROE%) are misleading for me but now makes much more sense.
This is a video where at current indicated time the ROE and PNL actually work as normal
https://youtu.be/fnKw_VzO4ng?t=763