Hello! I used to waste time doing that too until I found Lingopie. It is a video-based language platform designed specifically to solve this problem. When you watch a show there, you just hover over any word in the subtitles to get an immediate pop-up definition, and the video pauses automatically. It also includes short video clips in your review flashcards so you remember the context. It made my study sessions much faster and more productive. You can visit here to see their catalog of Portuguese content.