Fuel shortages cause increase in food prices

The video tutorial begins with a welcoming remark and then the speaker re-engages with the audience.

What do you think the speaker means by 'That will be nice'?

How does the tone of the first statement compare to the second?

In what situations might someone say 'That will be nice'?

What could be the context of the phrase 'I'm back again'?

What emotions might the speaker be expressing in these statements?