Yes, prior security clearances will not speed the process.

which form did you have to fill out for clearance?

Did you have to have a interview with the background investigator

Yes, I had to have an interview with a background investigator.

Once you cleared your investigation how long did it take to you start the job?

I believe it only took a few days for them to schedule the in-person interview. Don't feel slighted if it doesn't happen quickly, these are government contracts and tend to follow the government process of being very slow.

How long did it take for your security clearance to be completed?

5 months for me. 4 - 7 months is a normal range after talking to colleagues.

Depends on the department and level of clearance. They've been accepting people with interim clearances now and that has typically after 4-5 months from the people I spoke with.

What kind of questions were in the video interview?

After your home video interview how long did it take for them to call you about coming in for an interview?