Hi Larry Koutsavlis,
Thanks for the update.
We have checked the provided video and found that you are copying, you have entered edit mode and select the cell content and copy the content. In such case, textbox will be loaded as the edit element and the copying is performed from the textbox only. But while pasting the content, you have not entered into edit mode and try to paste the content just by selecting the row.
For copy and pasting rows in SfDataGrid, you should not trigger editing for the cell. You have to select the record by single click and perform the copy/paste operations. While copying/pasting in such manner, the entire row value will be copied/pasted (Not only the current cell value).
If your requirement is to copy and paste only the selected cell value, then you have to set SelectionUnit as Cell.
Please refer the below given help documentation link to know more about the clipboard operations support in SfDataGrid.
Please let us know if you require further assistance from us.
Regard,
Mohanram A.