We have recently implemented Experience cloud for our Native Apps , right now we want to capture mid value into traffic and conversion variables , is there any way we can achieve this?

We have not implement s_vi in our website instead we are using fallback method and using s_fid cookie ,so my question are as follows.1. Is it necessary to include s_vi cookie or s_fid will do.2. How we implement s_fid cookie and s_vi3. does not including s_fid causes any inflation in our results?

Does Experience Cloud ID helps in identifying a user if a user deletes his cookie, if they visit next time will they be considered as new user or will be still be considered as old user?

How can we track our videos through plugins also it is necessary to have Marketing Cloud ID enabled if we are using plugins?