Please watch this video, and give me an in depth, very thorough summary that is

Please watch this video, and give me an in depth, very thorough summary that is a minimum of 1500 words on Intro to 2D and M Mode Echo. Due by midnight on 1/6/2021. Do not use any external sources all information must come directly from the video. Using external sources will result in a lower grade. Please proofread and submit a well written paper. https://learn-us-east-1-prod-fleet02-xythos.content.blackboardcdn.com/5d56c99d1e4c8/1395431?X-Blackboard-Expiration=1641448800000&X-Blackboard-Signature=ZBU0CIJ3kCHC8NrQ3NQRcyNzUeK5KJ9FuQ%2BgeCFTXSE%3D&X-Blackboard-Client-Id=446176&response-cache-control=private%2C%20max-age%3D21600&response-content-disposition=inline%3B%20filename%2A%3DUTF-8%27%27Intro%2520to%25202D%2520and%2520M%2520Mode%2520Echo.mp4&response-content-type=video%2Fmp4&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEJH%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCXVzLWVhc3QtMSJIMEYCIQCiELTNoF7OOgQ%2B%2BDD3tmLV7Xf5aq04XYlUaybQuX5qhgIhAJeLMeK8DoB%2BJeMm4%2FlMO7LnLarF9%2Bz2uEySs5RucL7nKoMECJr%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAhoMNjM1NTY3OTI0MTgzIgzy0G%2B7kL19LexIZsoq1wP1lmujRL56M%2BuQKrX6UmCJ04Hd3356TwummuQbNFHFsjHL22kI%2FUt76rN5fyvJLKi1aH6jRhmocEvyFuUfhyn0FA6BmoZTY4%2B7J2CMtz8w5Z6yx28fT836lPETzyDfLWhi%2BjHj5%2F93vrk76XxtiXIdXWvTZkDPVhxc0DLLFbDnZy%2BEOr%2Bh3ZQcjvrR88BPHl1dzFQ0iG05OdI8VvztnhM5BfY6BWctiLCLghr%2B7jQxv3gk6rHOCGe17YD9xUcw%2BDHqGXlat7SnqJkIqCbKphuq6UjpUC4XdFcuxrGz4A9GOKeA%2FSshyhcoKeFaow6itPNuRdSfbPIo90L4b8fQPtY18rzxCl%2F6RJe6BoQCxLMf92mIUDBzzM02uitqwH3Cy42XMAGH7%2B9tGHqoB1gb0arrNh2mgN0ZBJiJ0Az7RJbEzvJFAt2KvGxLqqbFCVMilh7e3G7Np7VLYuIDd5vjE99YzhIHTq97k5gHeO4YLUYHqsOe6N2Cp6IbrQBL3kgvuXRdPgcOay5zCHklHOG1YFhDVYKpdJn7AA0GYxlhRRFM9Ndbq%2FuSHoGpYmicOlmR2bYnkic7wXlHp2wwefNwl4DhrTYpMQ72vLrKTkYCf%2BX0ElX56nrfCjEw8fDYjgY6pAHgkmeH2x9oRVQ02Knx3fSXKB%2BGTs1G8fTIu8Kmm4w4C%2BFZU37nGC8mo4eJ4kSOIrh2Mh5L8GjHUWhDVUb572x%2Bj8MLernITwfiI9gcAeMWx9UUhoPPYYDIfFw3pn07qLycwubP1dsW1QV4iX%2FJEMGQRZrs10RpmszEV640JS9xnaeFlkFGBV4CGKZNXDoM3vvnyzNrvjq7OH0MOfVIwiYipzK%2BTQ%3D%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20220106T000000Z&X-Amz-SignedHeaders=host&X-Amz-Expires=21600&X-Amz-Credential=ASIAZH6WM4PLR2UMMB3K%2F20220106%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Signature=a0c8e224dc084593c0f4d24987d52ec75348ee873d3ca960ca5a44e0988fd403