You can attempt to access the video by appending the ID to the standard TikTok URL structure: https://tiktok.com Finding Content on TikTok
Explore the Discover section at the bottom of the app to see trending hashtags and sounds that might be related to the video. tiktok_video_7158949678179028266
Use the magnifying glass in the top right corner of the TikTok App to search for keywords or the creator's username if known. You can attempt to access the video by
Narrow your search by "Watch history" or specific dates if you are looking for a video you previously viewed. tiktok_video_7158949678179028266