Clownfish fighting, or pairing?

Hello all, it has been a very long time since I have last posted and I am sorry I have just been very busy. I would like to start posting more and help answering questions now that I am more focused and have more time. It has been awhile since I have added anything in my tank. (Tank has been up for about 10 months now) all I have been successful with is one clown, peppermint shrimp and fire shrimp. So I kept the tank the same for awhile without added new things. Today I added a new clown to see if I could get them to paid and be successful. However, they started off alright. As soon as the hour passed I noticed the bigger clown (the one that's been in the longest) start to go after my other clown. Not nipping but like swimming really close and really aggressive towards it. I looked it up and it did say that this is how they pair, but I'm not too sure. So I turned off the tank lights and let it sit for awhile and I turned it back on and this is how they act. I will provide a new video upon request.



Link: https://youtu.be/COEZYbIdfwU