Please help me improve the following email. Thanks!

Please help me improve the following email. Thanks!

I would like to report that having reviewed the online training courses footages provided by the supplier, I find that the accusations from Mr.A, a participant of the above training course, are partially substantive and the details of my observations are shown as below:

1) It is true that the volume of the footage are a bit less than satisfied. Hoarse voice, echo excess and even bad voice occurred occasionally, notably during early part of the first footage. Similarly, there was without background music on several occasions and it did possibly affect the training atmosphere for the participants. However, it is untrue that the picture of the footage was as bad as Mr. A stated and I am honestly convinced the quality and smoothness of footage picture were satisfied.

2) It is correct that there was absence of name plate about the coach for the training course, especially at the beginning stage and the coach did once exist at the minor screen rather than large screen, which probably made the participants difficult to identify the coach and follow her instructions. Nevertheless, the supplier immediately rectified the problem by adding the name about the coach shortly. On the other hand, lip-sync problem with the sound from the coach did sporadically occur throughout the running of the footage and it resulted in affecting the participants learning process.

To conclude, the above online training courses are admittedly newly-introduced things and there is certainly a pretty large room for further improvement. I will closely monitor the running of these training courses and keep you informed of any discrepancies found immediately. Thank you.