This picture strikes me as odd.
- The contrails start suddenly for both a/cs. Normal comm a/cs contrails can be seen for a few miles long and the end will usually be blown partially by the wind.They will also be wide and wispy. Not thick and solid like this.
- Both a/cs look similiar and a bit strange. They are painted green.
- And TCAS resolution advisories are usually fly up or down. Not turn left or right.
To me, this is just military jets practising aerobatic manoevoures.