In most cases, each computer will have more than one browser installed. This is common because any browser can be an alternative to browsing activities. The existence of several browsers can be another alternative if the browser used is problematic for some reason. Using more than one browser can also provide a different browsing experience.
Of the several browsers on your computer, one browser will certainly be your favorite browser for browsing activities and another may only be used occasionally. Due to being a favorite browser and one that is often used, you may already have a lot of bookmarks in that browser.
A transcript is a text version of all the words spoken in the video in sequence. You may want to get a transcript of a YouTube video for whatever reason; there are a number of ways to do that. Although reaching 100% accuracy of the transcript is not guaranteed, it can be achieved if the video uploader uploads the transcribed file too. YouTube offers the option for content creators to upload a transcript file with their videos. By owning the transcribed video, and uploading the transcript to YouTube, Google gets specific information about the video's content. This helps in the SEO of questionable videos.