If these are Russian Mig-29s, they are flying very low and maybe threatened by MANPADS. The pilots should at least be popping flares in case of AA fire. However, if it is Ukrainian MiG-29s targeting Russian helos, it makes a lot of sense. The helos are flying low so the fighters are flying low. They are not popping countermeasures because AA on the ground is not going to fire at them.
Dude the video is like 3 seconds long. How do you know they weren't dropping flares?
And if they are Ukrainian fighters, would they really be worrying about Russian helos right now?
You first have to control the airspace before you move on to dealing with lower level threats.
Have they splashed that many Russian Flankers that all they have to worry about is helos now?