1 Record or upload your video. 2  At the end of the video processing stage in the upload interface, you will see an option to choose a Custom thumbnail under the Video thumbnails section. 3  Go to your channel Video Manager. 4  Locate a video and click the Edit button. 5  Click the Custom thumbnail button and upload a thumbnail.
Median is the middle number of a given dataset (if itÃÂ­s odd) while average is a definition of arithmetic mean, which is the most oft-cited average. The value of median depends on the number of elements in a data set (odd or even) while average does not.
â¢ An average is a measure used to find the location of. the middle (central tendency) of a data set. â¢ Mean, median and mode are all types of averages. â¢ Often the word average refers to the mean.to calculate the mean. 1. Add up all the values. 2. Divide by the number of values. An average is a measure used to find the location of. the middle (central tendency) of a data set. â¢ Mean, median and mode are all types of averages. â¢ Often the word average refers to the mean.