OK, I've implemented rough tfidf. When I filter the words in each stretch (each somewhere around a minute) from a podcast about local politics for tfidf score above 0.5, here's what I get:
"chelly, pronouns, danielle, thrilled, fourth",
"loves, colette's, bakery, bread, partial",
"method, politics, tired, story",
"summer, announced, john, amaral, read",
"escaped",
"",
"square, damn, prompted, half, day",
"immediately, sworn, aides, mentioned, -time",
"stepping",
"named",
"explanation, website, roles, responsibilities, working",
"friday, attending, groundwork, minutes, released",
"defined, differing, opinions, respond, recent",
"connect, staff, directors, overwhelming, figure",
"specific, met, wages, recognized",
"areas, active, math, view, buildings",
"space, districts, mcglynn, neighborhood, including",
"numbers, miss, everett, lines, partnering",
"plumbing, shop, grown, leaps, bounds",
"broad, throw, appreciated, systemic, thinks",
"balance, effectual, moment, displacement, gentrification",
"impact, resolution, represented, resources, free",
"",
"googled, speaking, cities",
"success, pros, cons, private, opinion",
"situation, expired, agreed, table",
"scheduled, forgive, turns, associations, weeks",
"gap, sides, negotiate, represents",
"approve, decides, committee's, parties, agreement",
"classes, reimbursement, constraint",
"license, number, pdps, informs, bigger",
"classes, reimbursement, constraint",
"license, number, pdps, informs, bigger",
"goal, spectrum, curious, beliefs, finish",
"grade, prom, experience, concise, warm",
"symphony, algebra, level, test, scores",
"positions, incumbency, choosing, step, rare",
"commitment, disappear, teases, tough, money",
"2023, 20, november, calendar, order",
"excited, son, stem, awesome, cool",
"selling, -shirts, present",
"remarks, proud, strong, history, dr",
"",
"brings, attention, homework, club, escaping",
"asks, absolutely, nicely, dovetails, comment",
"importance, reporting, harder",
"",
"mention",
"apparently, plenty",
"participants, crossed, mind, suggest, idea",
"nice, presenting, formal, body, laid",
"tonight's, current, teacher's, supporting, purchasing",
"feedback, future, medfordpod, gmail, .com"
At a glance, I think maybe it could tell you where to go in the podcast if you want to know about school issues. Later, I'll see if it lines up with what I hear.