This video is one of reasonably high quality production. At least it can make listeners stay on with it till the end. Good work.
Here's some feedback tips for anyone interested.
In many videos, which are otherwise visually well-produced, we often find the sound quality extremely stressful to bear with, resulting in many people leaving it without listening further. In this regard, it is well to exercise the greatest care to endure the speaker's voice does not sound 'distant'. This is an instant turn-off. It is not effective to correct any flawed recording after the recording. Care must be taken during the recording.
The cause of a speaker sounding 'distant' lies in the placement of the microphone. Placing the microphone too far from the speaker's mouth results in the speaker sounding 'distant'. Many sound recordings are made by carelessly placing the microphone/recorder on the table near the speaker. Merely putting some audible sound on a video is a world of difference than ensuring the sound played back is clear and comfortable for the listener. If this is neglected, all effort in producing the video in the first place will be gone to waste, since the intended message would not have been conveyed.
In addition to the critical microphone-to-mouth distance, it is also just as important to ensure that the axis of the microphone is aligned with the source of sound (the speaker's face/mouth/throat).