Salaah

Q: I have come across a Hadith narrated by Wail ibn Hujr (Radhiyallahu Anhu) on the description of the prophetic prayer in Abu Dawood, and there I found that we should raise the index finger from the starting of tashahud to the end of salah and we should slightly move (shivering/vibrating it in an infinitesimally small distance) but the people of my community raise their finger only while saying ash hadu an la I laha... (I know both of it can be done, but I would like to prefer the authenticity one) and so I did it up to now! Hanafi/Shafi school do it I think so, but could you please tell me what to do now.

Q: I heard from a shaik that one should move his lips while reciting azkaar in salaah or in general, and he gave the example of "one will not get sin if they think of sinning except they say or act on it. and the shaik said that so similar the good deeds!"

a. Once I read in a hadith that the Prophet (Sallallahu Alaihi Wasallam) never moved his lips in Salatul Asr. (I was not aware of the authenticity of that and I also remember that I read it from Sahih Muslim/Bukhari). 

b. I heard from another shaik that if someone around you recites anything only by moving his lips or some phrase with a sound and some without, then he said that one should warn such a person to stop it or read it clearly and loudly, if not then we have to tell them that "you are a witch person and will reveal it to everyone if you don't, (because it is an act of witches or magicians, the shaik said)" now which is correct and in which situations?

Q: Can I perform namaz with a face mask?

Q: Is Jamaat Salaah valid with the two-meter social distancing spacing?

Q: Is it permissible to offer salaah before azaan when the time of the prayer has begun?

Q: Prayers are offered in Masajid these days with distances between musallees being about one meter and leaving the alternate saff empty. Also, we need to wear a thin mask during prayers. This way the nose does not get in contact with the ground.

1. Are our prayers valid with distances in between?

2. Are our prayers valid with a face mask on? 

Q: Regarding the hadith which says that a person who performs salaah for 40 days with the first takbeer will get 2 certificates, is the first takbeer when the imaam starts the salaah or when the imaam goes into ruku?

Q: Is it permissible to perform salaah with a mask on? 

Q: Is it correct that if a person does an action that is not part of Salaah. e.g. scratching the body, etc. for more than 3 tasbeeh, the Salaah is broken?

If one performs Salaah behind someone who does this... Does he have to repeat his Salaah?

Q: What is regarded as Amal-e-katheer in salaah?