Caveat: I didn't watch the video.

You could make a generic correction for your camera under daylight (try outside on a day with a cloudless sky) using a quality chart. Take care to white balance your camera accurately.
Assuming indoors is daylight lit without any color casts, the thing you need to do is make the white balance match daylight. A good chart or simple white balance card will help you set a proper custom white balance. So white balance in camera, shoot the card for reference in post and then apply your custom correction LUT and it should work without needing a chart every time you shoot.

Here is a comparative review of white balance cards vs a $1000+ individually measured reference.

Thank you all for your replies.

What is your most recommended White Balance plugin?
1) Do you recommend this built-in White Balance plugin or maybe Ignite White Balance is better one or maybe some other third-party White Balance plugin is better than these 2 mentoned by me previously.

2) When I shoot wedding in a church and wedding party in the restaurant which takes 9 hours i.e. from 5pm till 1 am. How often I should record a color chart?

I usually only use white balance Fx.
If there's a cast in only highlights or shadows, color curves or 3 way color corrector can help, too.

I don't think you need to keep recording a chart for color, but if there are big changes in lighting, you should change the camera's white balance setting. You might save some WB presets if your camera supports it, for each of the main lighting situations you are in (i.e. white balance under the different lighting and save it) but you have to remember which one is which. Otherwise pick a value in the middle, take care not to overexpose as you'll need to correct color in post, and shoot the white balance card in each scene as a reference if you have time. If you don't have time there are menus, gray suits, white tablecloths, etc. that at least provide some visual reference for fixing it later in Vegas.